Which is TRUE about the scope and authority of data protection oversight authorities?

With respect to international transfers of personal data, the European Data Protection Board (EDPB) confirmed that derogations may be relied upon under what condition?

SCENARIO
Please use the following to answer the next QUESTION:
Edufox has hosted an annual convention of users of its famous e-learning software platform, and over time, it has become a grand event. It fills one of the large downtown conference hotels and overflows into the others, with several thousand attendees enjoying three days of presentations, panel discussions and networking. The convention is the centerpiece of the company's product rollout schedule and a great training opportunity for current users. The sales force also encourages prospective clients to attend to get a better sense of the ways in which the system can be customized to meet diverse needs and understand that when they buy into this system, they are joining a community that feels like family.
This year's conference is only three weeks away, and you have just heard news of a new initiative supporting it: a smartphone app for attendees. The app will support late registration, highlight the featured presentations and provide a mobile version of the conference program. It also links to a restaurant reservation system with the best cuisine in the areas featured. "It's going to be great," the developer, Deidre Hoffman, tells you, "if, that is, we actually get it working!" She laughs nervously but explains that because of the tight time frame she'd been given to build the app, she outsourced the job to a local firm. "It's just three young people," she says, "but they do great work." She describes some of the other apps they have built. When asked how they were selected for this job, Deidre shrugs. "They do good work, so I chose them." Deidre is a terrific employee with a strong track record. That's why she's been charged to deliver this rushed project. You're sure she has the best interests of the company at heart, and you don't doubt that she's under pressure to meet a deadline that cannot be pushed back. However, you have concerns about the app's handling of personal data and its security safeguards. Over lunch in the break room, you start to talk to her about it, but she quickly tries to reassure you, "I'm sure with your help we can fix any security issues if we have to, but I doubt there'll be any. These people build apps for a living, and they know what they're doing. You worry too much, but that's why you're so good at your job!" What safeguard can most efficiently ensure that privacy protection is a dimension of relationships with vendors?

SCENARIO
Please use the following to answer the next QUESTION:
Edufox has hosted an annual convention of users of its famous e-learning software platform, and over time, it has become a grand event. It fills one of the large downtown conference hotels and overflows into the others, with several thousand attendees enjoying three days of presentations, panel discussions and networking. The convention is the centerpiece of the company's product rollout schedule and a great training opportunity for current users. The sales force also encourages prospective clients to attend to get a better sense of the ways in which the system can be customized to meet diverse needs and understand that when they buy into this system, they are joining a community that feels like family.
This year's conference is only three weeks away, and you have just heard news of a new initiative supporting it: a smartphone app for attendees. The app will support late registration, highlight the featured presentations and provide a mobile version of the conference program. It also links to a restaurant reservation system with the best cuisine in the areas featured. "It's going to be great," the developer, Deidre Hoffman, tells you, "if, that is, we actually get it working!" She laughs nervously but explains that because of the tight time frame she'd been given to build the app, she outsourced the job to a local firm. "It's just three young people," she says, "but they do great work." She describes some of the other apps they have built. When asked how they were selected for this job, Deidre shrugs. "They do good work, so I chose them." Deidre is a terrific employee with a strong track record. That's why she's been charged to deliver this rushed project. You're sure she has the best interests of the company at heart, and you don't doubt that she's under pressure to meet a deadline that cannot be pushed back. However, you have concerns about the app's handling of personal data and its security safeguards. Over lunch in the break room, you start to talk to her about it, but she quickly tries to reassure you, "I'm sure with your help we can fix any security issues if we have to, but I doubt there'll be any. These people build apps for a living, and they know what they're doing. You worry too much, but that's why you're so good at your job!" Since it is too late to restructure the contract with the vendor or prevent the app from being deployed, what is the best step for you to take next?

SCENARIO
Please use the following to answer the next question:
Due to rapidly expanding workforce, Company A has decided to outsource its payroll function to Company B.
Company B is an established payroll service provider with a sizable client base and a solid reputation in the industry.
Company B's payroll solution for Company A relies on the collection of time and attendance data obtained via a biometric entry system installed in each of Company A's factories. Company B won't hold any biometric data itself, but the related data will be uploaded to Company B's UK servers and used to provide the payroll service. Company B's live systems will contain the following information for each of Company A's employees:
* Name
* Address
* Date of Birth
* Payroll number
* National Insurance number
* Sick pay entitlement
* Maternity/paternity pay entitlement
* Holiday entitlement
* Pension and benefits contributions
* Trade union contributions
Jenny is the compliance officer at Company A. She first considers whether Company A needs to carry out a data protection impact assessment in relation to the new time and attendance system, but isn't sure whether or not this is required.
Jenny does know, however, that under the GDPR there must be a formal written agreement requiring Company B to use the time and attendance data only for the purpose of providing the payroll service, and to apply appropriate technical and organizational security measures for safeguarding the data. Jenny suggests that Company B obtain advice from its data protection officer. The company doesn't have a DPO but agrees, in the interest of finalizing the contract, to sign up for the provisions in full. Company A enters into the contract.
Weeks later, while still under contract with Company A, Company B embarks upon a separate project meant to enhance the functionality of its payroll service, and engages Company C to help. Company C agrees to extract all personal data from Company B's live systems in order to create a new database for Company B.
This database will be stored in a test environment hosted on Company C's U.S. server. The two companies agree not to include any data processing provisions in their services agreement, as data is only being used for IT testing purposes.
Unfortunately, Company C's U.S. server is only protected by an outdated IT security system, and suffers a cyber security incident soon after Company C begins work on the project. As a result, data relating to Company A's employees is visible to anyone visiting Company C's website. Company A is unaware of this until Jenny receives a letter from the supervisory authority in connection with the investigation that ensues. As soon as Jenny is made aware of the breach, she notifies all affected employees.
The GDPR requires sufficient guarantees of a company's ability to implement adequate technical and organizational measures. What would be the most realistic way that Company B could have fulfilled this requirement?