Q.

Microwave transmission is used in environments where installing physical transmission media is _           

A. difficult or impossible and where line-of- sight transmission is unavailable
B. easy or promising and where line-of-sight transmission is unavailable
C. difficult or impossible and where line-of- sight transmission is available
D. easy or promising and where line-of-sight transmission is available
E. None of these
Answer» D. easy or promising and where line-of-sight transmission is available
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