What is the correct order to implement call coverage?

You are the network administrator. What is the correct order to implement call coverage?

A.
(I) (II) (III) (V) (IV)

B.
(IV) (I) (II) (III) (V)

C.
(V) (IV) (i) (ii) (Hi)

D.
(IV) (I) (II) (V) (III)

Explanation: