The correct answer is B) Contact the manufacturer for repair instructions. The reasoning for this is that immersion suits are critical safety equipment for mariners, and any defect in the external flotation bladder should be addressed promptly. The manufacturer will have specific guidance on how to properly inspect, test, and repair the bladder to ensure it functions as intended. Trying to "top off" a leaking bladder (A) or replacing the entire suit (D) without manufacturer guidance may not adequately address the issue. Replacing the inflation bladder (C) could be an appropriate step, but the manufacturer should be consulted first to ensure the correct repair procedure is followed.