Find the value of n so that the expression c^(2) + 4c + n is a perfect square trinomial. Then, factor the trinomial.
Which of the following options correctly completes the expression to form a perfect square trinomial?

A) c^(2) + 4c + 4
B) c^(2) + 4c + 9
C) c^(2) + 4c + 16
D) c^(2) + 4c + 25