An earth mat for a communication tower consists of

[A].	one or two radials extending from base of tower at a depth of about 5 cm below ground
[B].	a large number of radials extending from base of tower at a depth of about 3 m
[C].	a large number of radials extending from base of tower at a depth of about 30 cm
[D].	none of the above

Answer: Option C

Explanation:

The number of radials is large and depth is about 30 cm.