By ensuring that all content flows through a single point, proxies provide a
checkpoint for network data, which is an advantage rather than a liability, as are other choices.
Source: STREBE, Matthew and PERKINS, Charles, Firewalls 24seven, Sybex 2000, Chapter 8:
Application-Level Proxies.

The most important factor in establishing an effective Information Security Awareness Program is to obtain management buy-in. Management buy-in is the support and commitment of the senior management or the executives of an organization for a project or an initiative, such as an Information Security Awareness Program. An Information Security Awareness Program is a program that educates and trains the employees or the users of an organization about the security policies, procedures, risks, and best practices, and aims to improve the security culture and behavior of the organization. Obtaining management buy-in is essential for establishing an effective Information Security Awareness Program, as it can help to define the goals and objectives of the program, allocate the resources and budget for the program, communicate the importance and value of the program, and monitor and evaluate the progress and outcomes of the program. Management buy-in can also help to demonstrate the leadership and accountability of the management, and to motivate and influence the employees or the users to participate and comply with the program. Conducting an annual security awareness event, mandating security training, and hanging information security posters on the walls are not the most important factors in establishing an effective Information Security Awareness Program. These are some of the methods or techniques that may be used to implement or deliver the Information Security Awareness Program, but they are not as crucial or influential as obtaining management buy-in. Conducting an annual security awareness event is a method that organizes a special event or a campaign once a year, to raise the awareness and knowledge of the employees or the users about the security topics or issues. Mandating security training is a method that requires the employees or the users to attend or complete a formal or structured training course or session, to learn the security skills or competencies. Hanging information security posters on the walls is a method that displays or distributes visual or graphical materials, such as posters, flyers, or stickers, to remind or inform the employees or the users about the security messages or tips.
References: Official (ISC)2 CISSP CBK Reference, Fifth Edition, Domain 1, Security and Risk Management, page 51. CISSP All-in-One Exam Guide, Eighth Edition, Chapter 1, Security Governance Through Principles and Policies, page 53.

Workers can easily waste time and system resources by interacting with social media when that task is not part of their job description. The company's acceptable user policy (AUP) should indicate that workers need to focus on work while at work rather than spending time on personal or non-work-related tasks.

The security functional requirements of Common Criteria are meant to describe the expected security behavior of a Target of Evaluation (TOE). These requirements are detailed and are used to evaluate the security functions that a TOE claims to implement.

Explanation/Reference:
Explanation:
Because data centers usually hold expensive equipment and the company's critical data, their protection should be thoroughly thought out before implementation. Data centers should not be located on the top floors because it would be more difficult for an emergency crew to access it in a timely fashion in case of a fire. By the same token, data centers should not be located in basements where flooding can affect the systems. And if a facility is in a hilly area, the data center should be located well above ground level. Data centers should be located at the core of a building so if there is some type of attack on the building, the exterior walls and structures will absorb the hit and hopefully the data center will not be damaged.
Incorrect Answers:
A: The information processing facilities should not be in the basement because of the risk of flooding.
Therefore, this answer is incorrect.
B: The information processing facilities should not be on the ground floor because of the risk of flooding.
Therefore, this answer is incorrect.
D: The information processing facilities should not be on the top floor because it would be more difficult for an emergency crew to access it in a timely fashion in case of a fire. Therefore, this answer is incorrect.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 454