Final answer:
The Sea Service Deployment Ribbon is awarded to personnel who have completed 12 months of accumulated sea duty, including at least one deployment of 45 days. Hence, option (C) is correct.
Step-by-step explanation:
The Sea Service Deployment Ribbon (SSDR) is awarded to personnel assigned to U.S. homeported ships, deploying units, or units of the Marine Corps operating forces who have completed 12 months of accumulated sea duty, including at least one deployment of consecutive 45 days.
This ribbon recognizes the service members' commitment and dedication to sea duty and their contribution to the mission and readiness of the Navy and Marine Corps.
By completing at least one deployment of 45 consecutive days, these personnel demonstrate their ability to operate effectively in a maritime environment and contribute to the overall mission success.