The correct answer is C) National Cargo Bureau. The National Cargo Bureau is responsible for conducting surveys and inspections of refrigerated cargo stowage to ensure proper methods were utilized. This is in accordance with regulations and standards set forth by the International Maritime Organization (IMO) and the U.S. Coast Guard for the safe carriage of refrigerated and other cargo. The other options are incorrect because the U.S. Coast Guard does not directly conduct these cargo surveys, the American Bureau of Shipping oversees vessel certification but not specific cargo inspections, and OSHA regulations focus on occupational safety, not cargo stowage procedures.