The correct answer is C) U.S. Coast Guard. The U.S. Coast Guard is responsible for reviewing and approving a vessel's fire control plan. This is a requirement under U.S. maritime regulations, specifically 46 CFR 78.47, which states that the fire control plan must be submitted to and approved by the Coast Guard before the vessel can be issued a certificate of inspection. The other options are incorrect because the International Maritime Organization (IMO) sets international standards but does not directly approve individual vessel plans, a vessel's classification society oversees the design and construction but does not approve the fire control plan, and the Maritime Administration (MARAD) is a separate agency that does not have authority over fire control plan approvals.