Factor the Perfect Square Trinomial Completely $z ^ { 2 } + 4 z + 4$

Multiple Choice

Factor the perfect square trinomial completely.
- $z ^ { 2 } + 4 z + 4$

A) $( z + 4 ) ( z - 4 )$
B) $( \mathrm { z } - 2 ) ^ { 2 }$
C) $( \mathrm { z } + 2 ) ^ { 2 }$
D) $( \mathrm { z } + 2 ) ( \mathrm { z } - 2 )$