For two different locations to communicate via satellite links, they must be within the satellite’s line of sight and ______________________.

A.
Area

B.
Distance

C.
Coverage

D.
Footprint

Explanation:
Today, satellites are used to provide wireless connectivity between
different locations. For two different locations to communicate via satellite links,
they must be within the satellite’s line of sight and footprint (area covered by the
satellite). The sender of information (ground station) modulates the data onto a
radio signal that is transmitted to the satellite. A transponder on the satellite
receives this signal, amplifies it, and relays it to the receiver.