Navtex transmitter identification character（）is used to identify the broadcasts which are to be accepted by the receiver and those are to be rejected.

A.frequency allocated
B.both language and frequency
C.language used
D.transmission power and time

A.10 minutes every 4 hours
B.half an hour every other hour
C.irregular period of time
D.5 minutes every two hours

A.in any INMARSAT regions
B.in each NAVTEX area
C.at any distance
D.in Areas A3 and A4