The correct option is B Satellite communication
Ground wave propagation uses the area between surface of earth and the ionosphere for transmission. It is commonly used for local radio communication coverage.
Sky waves propagate due to the reflection or refraction back to the earth's surface from the ionosphere. These can be used for intercontinental communication.
Space waves can travel from earth's surface to the troposphere layer. these waves are limited to the curvature of the earth.
In satellite communication all the signals transferring is in space. Signals are received from earth's surface and amplified at the satellite and sent back to earth's surface. The whole earth can be covered by putting 3 satellites in geosynchronous orbit.
Thus, satellite communication has the highest coverage range.