What role does Executive Order 13869 assign to the Secretary of Defense?

The correct choice emphasizes the responsibility assigned to the Secretary of Defense regarding security, suitability, and credentialing background investigations. Executive Order 13869 specifically aims to enhance the vetting process for individuals seeking access to certain positions within the federal government, particularly those with national security implications. By assigning this role to the Secretary of Defense, the order underscores the importance of thoroughly assessing individuals' backgrounds to ensure that they meet the rigorous standards required for sensitive positions. This is critical for maintaining the integrity and security of government operations, particularly in areas involving national defense.

The other choices, while related to personnel management and government operations, do not reflect the specific responsibilities outlined in Executive Order 13869. The focus on background investigations highlights the priority that the order places on establishing secure work environments and the integrity of personnel in governmental roles.