The correct answer is C) Order the dock man to shut down. When a cargo valve jams open during bulk liquid cargo loading, the first action you should take is to order the dock man to shut down the cargo transfer operation. This is the correct response because it immediately stops the uncontrolled flow of cargo, which could lead to a spill or other hazardous situation. Calling the owner/operator or unplugging scuppers would not address the root problem of the jammed valve. Running out a fire hose is also not the appropriate first step, as that could potentially make the situation worse. The proper procedure is to shut down the cargo transfer as quickly as possible to mitigate any potential spill or loss of containment. Ordering the dock man to initiate the emergency shutdown is the quickest and most effective way to accomplish this.