What is primarily developed for main operating bases or collocated operating bases?

The correct choice, Base Support Plan (BSP), is primarily developed for main operating bases or collocated operating bases because it outlines the necessary services and support required to operate those bases effectively. The BSP covers various aspects, including logistics, personnel, mission support, and facilities management. It serves as a comprehensive guide ensuring that all elements needed for maintaining base operations are accounted for and appropriately managed to support the mission objectives of the U.S. military or any operational activity taking place at the bases.

The other options focus on different aspects of military operations. The Emergency Action Plan (EAP) is designed for immediate response in emergency situations and does not specifically encompass the broader operational and support requirements of a base. The Operational Security Plan (OSP) addresses the safeguarding of critical information and operations but does not deal directly with base support logistics. The Contingency Response Plan (CRP) is tailored for specific contingencies or rapid responses in crisis situations, focusing on deployment and action rather than the foundational support for bases. Hence, while these plans are important, they do not serve the primary purpose of supporting the overall operational environment of a main operating base like the BSP does.