Who holds the title of CMC in the command structure?

The title of CMC refers to the Command Master Chief, which is a vital position in the command structure of the Navy. The Command Master Chief serves as the senior enlisted advisor to the commanding officer and is responsible for the welfare, readiness, and professional development of the enlisted personnel within the command. This role is critical in bridging the gap between the officers and enlisted members, ensuring clear communication and addressing any concerns that may arise within the ranks.

In the context of this question, the choice identifying Command Master Chief McDermott aligns perfectly with the role and responsibilities associated with the title of CMC. The other individuals listed, such as Rear Admiral Bruce L. Gillingham, LCDR Urban, and Captain Castro, hold different ranks and positions that do not correspond to the duties and responsibilities of a Command Master Chief, making them unsuitable answers for the specific title being inquired about.