Final answer:
The Seabees primarily have the mission of constructing advance base facilities in support of armed forces.
Step-by-step explanation:
The correct answer is c) Seabees.
The primary mission of constructing advance base facilities in support of armed forces is carried out by the Seabees. The Seabees are a specialized unit of the United States Navy that specializes in construction and engineering tasks. They are responsible for building and maintaining infrastructure, such as airfields, roads, and housing, to support military operations.
For example, during World War II, the Seabees played a crucial role in constructing military bases, airstrips, and other facilities in various theaters of war. They continue to contribute to military operations and humanitarian efforts today.