Data recovery is the process of restoring data that has been lost, corrupted, or deleted. When a file is deleted, it is usually not physically erased from the disk, but only marked as free space by the operating system. Therefore, it may be possible to recover the file by using specialized tools that scan the disk for the file's data. However, if the file has been overwritten by another file or data, then the original file's data is lost and cannot be recovered. The other options are not as challenging as overwriting, because they only affect the logical structure of the disk, not the physical data. For example, the partition table, the directory, and the formatting information can be reconstructed or bypassed by using forensic tools. Reference = CISM Review Manual, 16th Edition, Chapter 5, Section 5.4.1.2

Explanation
Information security priorities may, at times, override technical specifications, which then must be rewritten to conform to minimum security standards. Regulatory and privacy requirements are government-mandated and, therefore, not subject to override. The needs of the business should always take precedence in deciding information security priorities.

A technical vulnerability assessment is a process of identifying and evaluating the weaknesses and risks associated with a specific system, component, or network. A technical vulnerability assessment can help to determine the potential impact and likelihood of a security breach, as well as the appropriate measures to prevent or mitigate it. A technical vulnerability assessment should be performed on a personnel information management server whenever there is an increase in the number of unauthorized access attempts to the server, as this indicates that the server may have been compromised or targeted by an attacker12. Therefore, option C is the correct answer. References =
* CISM Review Manual (Digital Version), Chapter 5: Information Security Program Management
* CISM Review Manual (Print Version), Chapter 5: Information Security Program Management

The main reason for having senior management review and approve an information security strategic plan is to ensure that the plan aligns with the corporate governance of the organization. Corporate governance is the set of responsibilities and practices exercised by the board and executive management to provide strategic direction, ensure objectives are achieved, manage risks appropriately and verify that the organization's resources are used responsibly1. An information security strategic plan is a document that defines the vision, mission, goals, objectives, scope and approach for the information security program of the organization2. The plan should be aligned with the organization's business strategy, risk appetite, culture, values and objectives3. By reviewing and approving the plan, senior management demonstrates their commitment and support for the information security program, ensures its alignment with the corporate governance, and provides the necessary resources and authority for its implementation4. Reference = 1: CISM Review Manual 15th Edition, ISACA, 2017, page 172: CISM Review Manual 15th Edition, ISACA, 2017, page 253: CISM Review Manual 15th Edition, ISACA, 2017, page 264: CISM Review Manual 15th Edition, ISACA, 2017, page 27.
Senior management review and approval of an information security strategic plan is important to ensure that the plan is aligned with the organization's overall corporate governance objectives. It is also important to ensure that the plan takes into account any legal and regulatory requirements, as well as the resources and staff needed to properly implement the plan.