【单选题】Which stations may not transmit on the frequencies in which distress traffic is taking'place?
A.
Any stations taking part in the search and rescue operation under the coordination of the rescue Coordination Center or any stations appointed by them to coordinate distress traffic.
B.
Any stations in distress.
C.
The Rescue Coordination Center and any stations appointed by them to coordinate distress traffic .
D.
Any stations for which silence was imposed by the Rescue Coordinator during search and rescue opertions