Final answer:
Prior service soldiers have to meet the body composition standards of AR 600-9 within 180 days from reentry to active duty, according to Army standards for physical readiness.
Step-by-step explanation:
The subject of your question relates to the body composition standards that prior service soldiers must adhere to according to Army Regulation 600-9.
The correct answer to your question is that prior service Soldiers are required to meet the body composition standards of AR 600-9 within 180 days from reentry to active duty. This regulation ensures that soldiers maintain physical readiness through standardized body weight and composition measures.