Who is responsible for supplying information to be entered in the FITREP regarding body composition measurements?

The correct choice highlights that the responsibility for supplying information about body composition measurements in the Fitness Report (FITREP) falls to the Fitness Instructor (FFI) or Certified Personal Trainer (CPTR). This is because these individuals have the specialized training and knowledge necessary to accurately conduct assessments and interpret body composition data. They are typically involved in the evaluation process, ensuring that the measurements taken adhere to established guidelines and protocols.

By delegating this responsibility to trained professionals, the integrity of the body composition data is upheld, allowing for consistent and reliable reporting in the FITREP. This system not only supports effective evaluations but also promotes accountability within the fitness measurement process. The choices regarding who could potentially provide this information, such as the evaluated Marine, commanding officer, or administrative clerk, do not possess the same level of expertise or oversight in administering these assessments and thereby would not be suitable for this specific role.