The correct answer is B) Report the facts immediately to the Master, who will make a decision. This is the correct answer because, as the Captain or Master of the vessel, the ultimate responsibility for the safe handling and transport of hazardous cargo lies with the Master. When an incident involving hazardous cargo occurs, the Master must be immediately informed so they can assess the situation, determine the appropriate course of action, and provide direction to the crew. Reporting the issue directly to the Master ensures a timely and proper response, as they have the authority and knowledge to handle such situations safely and in accordance with regulations. The other options are incorrect because: A) Logging the issue without immediately informing the Master could delay the response; C) Jettisoning the cargo without the Master's approval would be an unauthorized and potentially dangerous action; and D) Making an independent determination of the seriousness could lead to an inappropriate or unsafe response without the Master's oversight.