You are Master of a vessel that is sold in a foreign country after discharge of cargo. What is your responsibility to the crew in regards to return to the United States? （）

A. You must provide air transportation to the nearest port of entry in the United States
B. You must provide passage to the port of original engagement
C. There is no requirement for return to the United States provided the voyage has exceeded 4 weeks duration
D. The crew can be employed on another United States vessel，but only if it is returning to the port of original engagement