Which staff organization in the Marines/Army deals with intelligence?

The correct answer is B because the S2 staff organization is specifically responsible for intelligence within the Army and Marine Corps. The S2 staff officer focuses on collecting, analyzing, and disseminating intelligence that is essential for operational planning and decision-making. This role typically involves assessing threats, providing situational awareness, and supporting tactical and strategic operations.

The S1 is focused on personnel management and administrative functions, ensuring that soldiers are properly managed and supported. The S3 is responsible for operations, including planning and coordinating training and execution of military activities. The S4 handles logistics, dealing with the supply and maintenance of resources necessary for conducting operations. Each of these staff functions plays a vital role within military operations, but it is the S2 that centers explicitly on matters of intelligence, making it the appropriate choice for this question.