The terrestrial system of GMDSS consists of（）.

A、radio-telephony, DSC, Direct Printing Telegraphy,Navtex and SART

B、INMARSAT, DSC, Direct Printing Telegraphy, Navtex and SART

C、radio-telephony,DSC,EPLRB,Navtex and SART

D、Status Recording system,DSC,Direct Printing Telegraphy, Navtex and SART