Operational security (OPSEC) is a process that prevents sensitive information from getting into the wrong hands by viewing operations from the perspective of an adversary1. Facility access is a form of OPSEC that controls who can enter and exit a physical location where sensitive data or equipment is stored or processed.
Facility access can include measures such as locks, alarms, badges, biometrics, guards, and cameras. The other options are not correct because:
Mobile device compliance is a policy that ensures that mobile devices used by employees or contractors meet certain security standards and requirements, such as encryption, password protection, antivirus, and remote wipe. Mobile device compliance is not a form of OPSEC, but rather a form of data security or device management.
Background screening is a process that checks the criminal, financial, and employment history of a potential employee or contractor before hiring them. Background screening is not a form of OPSEC, but rather a form of human resource management or risk mitigation.
Multifactor authentication is a method that requires users to provide two or more pieces of evidence to verify their identity before accessing a system or service, such as a password, a code, a token, or a biometric.
Multifactor authentication is not a form of OPSEC, but rather a form of access control or identity management. References = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 10:
Executing and Closing Projects, page 314; CompTIA Project+ Certification Exam Objectives, Domain 3:
Project Execution, Objective 3.2: Given a scenario, execute and monitor project tasks using traditional methodologies; What is Operational Security? The Five-Step Process, Best Practices, and More

The project manager can use the survey results as an input for performance feedback for the project team
members. Performance feedback is a process of providing constructive and timely information on the
performance of individuals or teams in relation to project goals and expectations. Performance feedback can
help to motivate, improve, and recognize project team members345
The survey results can be used as an input for performance feedback. Performance feedback involves
analyzing and evaluating the performance of the project team and project management against the project plan,
including identifying areas for improvement. The survey results can help identify these areas for improvement
and provide feedback to the project team on their performance. References: CompTIA Project+ Study Guide
Section 4.1.1

The closing phase is when the project manager and the team finalize the project, deliver the outcomes to the customer, obtain formal acceptance, conduct lessons learned, and hand over the project to the operations team. Identifying the baseline go-live date, the operational training, and the handoff procedures are part of the closing activities that ensure a smooth transition and closure of the project. Reference = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 14: Closing Projects, p. 333-334.

The percentage of risk investments with defined business cases is a metric that measures how well the information security program aligns with the operational objectives of the organization. It indicates how many of the security-related investments are justified by a clear analysis of the expected benefits, costs, and risks, and how they support the business goals and priorities. This metric can help the organization optimize its security spending, demonstrate the value of security to the stakeholders, and align the security strategy with the business strategy1. References = Performance Measurement Guide for Information Security, Section
3.2.3, page 16; Key Performance Indicators for Security Governance, Part 1, Section 3, page 3.