Which rates are compressed to become CUCM?

The correct answer is the first option, as it identifies the rates that are specifically compressed to form the CUCM, or Chief Utilities Chief Man. In this context, "compressed" refers to the process by which specific job specializations or ratings within a branch of the military are consolidated or modified in their structure or title to create a unified rating, allowing for more streamlined promotion and job categorization.

EACS, BUCS, and SWCS represent Electronics Technician, Boatswain's Mate, and Submarine Warfare Specialist, respectively. These ratings were brought together to establish the CUCM, which is reflective of a broader operational scope within the naval service, allowing for improved flexibility in manpower utilization and training.

Other options consist of different ratings that are not involved in the creation of CUCM. Therefore, they don't pertain to the specific compression process that led to the formation of the CUCM rating. Understanding this helps clarify how the Navy evolves and optimizes its personnel structure to meet operational demands.