Under Which Conditions Does the FBI Have Jurisdiction Over a Crime

Under which conditions does the FBI have jurisdiction over a crime committed on a cruise ship while it was at sea?

A) If the victim is an American citizen and the ship is sailing from and returning to a U.S.port
B) If the victim is an American citizen and the ship is sailing from or returning to a U.S.port
C) If the victim is an American citizen regardless of the ports for the ship's departure or return
D) If the victim is any country's citizen and the ship is sailing from or returning to a U.S.port