A.two B.three C.more than two D.more than three
A.Space Segment, NCC, RCC, SES, and CES B.Space Segment, a satellite system, C system, NCC and NCS C.Space Segment, NCC, NCS, CES and SES D.A system, C system, satellite system, earth stations and NCS
A.4 B.9 C.8 D.5