When can routine communications be resumed when radio silence has been imposed?

A
After determining that the frequency or channel appears to be no longer in use
B
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergergency communications
C
Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded.
D
If, in the Master's opinion, communications on that frequency will interfere with emergency communications
E