You are signing on a crew. A man presents a Merchant Mariner's Document that you suspect has been tampered with. Which action should you take?

A
Confiscate the document and deliver it to the Coast Guard.
B
Sign the man on and notify the Coast Guard at the first U.S. port of call.
C
Refuse to sign the man on articles until authorized by the Coast Guard.
D
Refuse to sign the man on and notify the FBI of unauthorized use of a federal document.
E