A U.S. vessel participating in AMVER (Automated Mutual-Assistance Vessel Rescue System) must discontinue reporting when __________.

A
under VNCS (Voluntrary Naval Control of Shipping)
B
nuclear war is in progress whether the ship is in the danger area or not
C
at once, when placed under Full NCS (Naval Control of Shipping)
D
None of the above situations are correct.
E