The correct answer is B) shipper. The "dangerous cargo manifest" is a document that must be obtained from the shipper of the combustible cargo. This is because the shipper is responsible for providing the necessary information about the cargo, including its hazardous properties, handling requirements, and emergency response procedures. The shipper has the most detailed knowledge of the cargo and is required to supply this information to the carrier (in this case, the Coast Guard vessel) in the form of the dangerous cargo manifest. The other options are incorrect because the ABS (American Bureau of Shipping) is a classification society that does not directly handle cargo shipments, the manufacturer may not have direct knowledge of the cargo once it is shipped, and the Coast Guard is the regulatory body that requires the dangerous cargo manifest, not the entity that provides it.