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