The best solution for ensuring secure remote access to corporate resources is to use a virtual private network (VPN), as this creates an encrypted tunnel between the user's device and the corporate network, preventing unauthorized interception or modification of data in transit. Additional firewall rules may help to restrict access to certain ports or protocols, but they do not provide encryption or authentication. Multi-factor authentication may help to verify the identity of the user, but it does not protect the data in transit. Virtual desktop may help to provide a consistent user interface and access to applications, but it does not ensure the security of thecommunication channel. References: CISA Review Manual (Digital Version), Chapter 5:
Protection of Information Assets, Section 5.2: Network Security Devices and Technologies

In a controlled application development environment, the most important segregation of duties should be between the person who implements changes into the production environment and the application programmer. This segregation of duties ensures that no one person can create and deploy code without proper review, testing, and approval. This reduces the risk of errors, fraud, or malicious code being introduced into the production environment.
The other options are not as important as the segregation between the application programmer and the person who implements changes into production, but they are still relevant for achieving a secure and reliable application development environment. The segregation of duties between the person who implements changes into production and the systems programmer is important to prevent unauthorized or untested changes to system software or configuration. The segregation of duties between the person who implements changes into production and the computer operator is important to prevent unauthorized or uncontrolled access to production data or resources. The segregation of duties between the person who implements changes into production and the quality assurance (QA) personnel is important to ensure independent verification and validation of code quality and functionality.
References:
ISACA CISA Review Manual 27th Edition (2019), page 247
Segregation of Duties in an Agile Environment | AKF Partners3
Separation of Duties: How to Conform in a DevOps World4

The best option for ensuring confidentiality through the use of asymmetric encryption is to encrypt a message with the recipient's public key (option A). This is because:
Asymmetric encryption, also known as public-key cryptography, is a type of encryption that uses a pair of keys to encrypt and decrypt data. The pair of keys includes a public key, which can be shared with anyone, and a private key, which is kept secret by the owner12.
In asymmetric encryption, the sender uses the recipient's public key to encrypt the data. The recipient then uses their private key to decrypt the data. This approach allows for secure communication between two parties without the need for both parties to have the same secret key12.
Encrypting a message with the recipient's public key ensures that only the recipient can decrypt it with their private key. This provides confidentiality, which means that the message is protected from unauthorized access or disclosure12.
Encrypting a message with the sender's private key (option B) does not ensure confidentiality, but rather authentication, which means that the message can be verified as coming from the sender. This is because anyone can decrypt the message with the sender's public key, but only the sender can encrypt it with their private key12.
Encrypting a message with the sender's public key (option C) or the recipient's private key (option D) does not make sense, as it would render the message unreadable by both parties. This is because neither party has the corresponding key to decrypt it12.
Therefore, the best option for ensuring confidentiality through the use of asymmetric encryption is to encrypt a message with the recipient's public key (option A), as this ensures that only the recipient can decrypt it with their private key.
References: 1: What is asymmetric encryption? | Asymmetric vs. symmetric ... - Cloudflare 2: What is Asymmetric Encryption? - GeeksforGeeks

The primary role of a control self-assessment (CSA) facilitator is to focus the team on internal controls. A CSA facilitator is a person who guides the CSA process and helps the participants to identify, assess, and improve their internal controls. The facilitator does not conduct interviews, report on weaknesses, or provide solutions, as these are the responsibilities of the participants themselves1.
The other options are incorrect because they are not the primary role of a CSA facilitator. Option A, conduct interviews to gain background information, is a preliminary step that may be done by the facilitator or the participants before the CSA session, but it is not the main purpose of the facilitator. Option C, report on the internal control weaknesses, is an outcome of the CSA process that should be done by the participants who own and operate the controls. Option D, provide solutions for control weaknesses, is also an outcome of the CSA process that should be done by the participants who are in charge of implementing the improvements.
References:
ISACA, CISA Review Manual, 27th Edition, 2019, page 2822
ISACA, CISA Review Questions, Answers and Explanations Database - 12 Month Subscription, QID
1066693
PwC, Control Self Assessments4
Workiva, 4factors of an effective control self-assessment (CSA) program5