The best security control for an organization that permits the storage and use of its critical and sensitive information on employee-owned smartphones is establishing the authority to remote wipe. Remote wipe is a feature that allows an authorized administrator or user to remotely erase the data on a device in case of loss, theft, or compromise1. Remote wipe can help prevent unauthorized access or disclosure of the organization's information on employee-owned smartphones, as well as protect the privacy of the employee's personal data.
Remote wipe can be implemented through various methods, such as mobile device management (MDM) software, native device features, or third-party applications2. However, remote wipe requires the consent and cooperation of the employee, as well as a clear policy that defines the conditions and procedures for its use.
The other options are not the best security controls for an organization that permits the storage and use of its critical and sensitive information on employee-owned smartphones. Developing security awareness training is an important measure to educate employees about the security risks and responsibilities associated with using their own smartphones for work purposes, but it does not provide a technical or physical protection for the data on the devices3. Requiring the backup of the organization's data by the user is a good practice to ensure data availability and recovery in case of device failure or loss, but it does not prevent unauthorized access or disclosure of the data on the devices4. Monitoring how often the smartphone is used is a possible way to detect abnormal or suspicious activities on the devices, but it does not prevent or mitigate the impact of a data breach on the devices. References: 4: Mobile Device Backup - NIST 3: Security Awareness Training - NIST
1: Remote Wipe - Lifewire 2: How Businesses with a BYOD Policy Can Secure Employee Devices - IBM :
Mobile Device Security Policy - SANS

= Data owner is the best suited to determine how the information in a database should be classified, because data owner is the person who has the authority and responsibility for the data and its protection. Data owner is accountable for the business value, quality, integrity, and security of the data. Data owner also defines the data classification criteria and levels based on the data sensitivity, criticality, and regulatory requirements.
Data owner assigns the data custodian and grants the data access rights to the data users. Data owner reviews and approves the data classification policies and procedures, and ensures the compliance with them.
References = CISM Review Manual, 16th Edition, Chapter 1: Information Security Governance, Section:
Data Classification, page 331

An information security governance framework is a set of principles, policies, standards, and processes that guide the development, implementation, and management of an effective information security program that supports the organization's objectives and strategy. The framework provides direction to meet business goals while balancing risks and controls, as it helps to align the information security activities with the business needs, priorities, and risk appetite, and to ensure that the security resources and investments are optimized and justified.
References = CISM Review Manual 2022, page 321; CISM Exam Content Outline, Domain 1, Knowledge Statement 1.22; CISM domain 1: Information security governance Updated 2022

The ultimate goal of an anti-phishing campaign is to reduce the risk and impact of phishing attacks on the organization. Therefore, the most relevant and reliable indicator of the effectiveness of an anti-phishing campaign is the decreased number of incidents that have occurred as a result of phishing. This metric shows how well the employees have learned to recognize and report phishing emails, and how well the security controls have prevented or mitigated the damage caused by phishing.
References = Five Ways to Achieve a Successful Anti-Phishing Campaign; Don't click: towards an effective anti-phishing training. A comparative literature review; CISA, NSA, FBI, MS-ISAC Publish Guide on Preventing Phishing Intrusions