Final Answer:
Officers in the grade of O-5 (Commander) and above may approve the Navy and Marine Corps Commendation Medal for personnel O-6 and below in their chain of command. Option D is answer.
Step-by-step explanation:
The Navy and Marine Corps Commendation Medal is a military decoration presented by the United States Navy and Marine Corps. The authority to approve this medal for personnel O-6 and below lies with officers in the grade of O-5 (Commander) and above.
This means that officers holding the rank of Captain (O-6), Rear Admiral (Lower Half) (O-7), Rear Admiral (Upper Half) (O-8), Vice Admiral (O-9), and Admiral (O-10) have the authority to approve the award for personnel within their chain of command. Options A (O-2), B (O-3), and C (O-4) represent lower officer grades and do not possess the authority to approve this medal for O-6 and below.
Option D is answer.