What constitutes a mission-specific obligation to enhance crew performance?

A mission-specific obligation to enhance crew performance refers to a formal arrangement that establishes specific responsibilities and commitments that personnel must adhere to in relation to their duties. In this context, the correct choice highlights that a contract serves as the foundational framework where expectations, roles, and performance standards are outlined, ultimately aimed at ensuring effective collaboration and execution of missions.

In contrast, while a mission briefing provides important information and context about the operation, it does not constitute an obligation. A flight plan details the route and operational details for the flight but lacks the formal binding nature of a contract. A team-building exercise may help improve cohesion and communication among crew members, but it does not impose specific obligations or responsibilities necessary for mission fulfillment. Therefore, a contract stands out as the appropriate answer due to its role in establishing clear commitments for enhancing crew performance in line with mission objectives.