Your vessel is on an extended foreign voyage. Several vacancies have occurred in your unlicensed crew through sickness and repatriation. Which statement is correct?

A
Aliens may be employed except that all U.S. flag vessels must maintain no less than 90% U.S. citizens in the crew.
B
Qualified aliens may be employed to fill the vacancies.
C
Seamen to fill vacancies must be flown from U.S. to join the vessel in the foreign port.
D
Vacancies can only be filled by U.S. citizens with valid Merchant Mariner's Documents.
E