Which document outlines the responsibilities for all program protection activities?

The Program Protection Plan (PPP) is the correct choice because it is specifically designed to outline the responsibilities and methodologies for all program protection activities within a defense program. The PPP provides a comprehensive strategy for ensuring that a system is protected against threats throughout its lifecycle, detailing required actions and assigning responsibilities for risk assessments, technology security, and threat mitigation efforts.

By establishing clear responsibilities and procedures, the PPP ensures that all stakeholders understand their roles in protecting the system from potential vulnerabilities, including adverse effects from technological advancements, foreign intelligence threats, and insider risks. This document serves as a framework for implementing protective measures and securing sensitive program information, making it critical for effective program management in systems acquisition.

Other documents mentioned do serve important functions within the acquisition process but do not focus specifically on outlining program protection activities. For instance, the Capstone Threat Assessment (CTA) identifies potential adversary threats and their capabilities but does not assign responsibilities related to program protection. The Defense Acquisition Strategy addresses overall strategy and resource allocation for a program but lacks the specific focus on program protection activities that the PPP provides. Lastly, the Intelligence Support Plan is aimed at coordinating intelligence efforts rather than detailing the specific responsibilities associated with program protection.