Factor the Perfect Square Trinomial Completely $x ^ { 2 } + 30 x + 225$

Multiple Choice

Factor the perfect square trinomial completely.
- $x ^ { 2 } + 30 x + 225$

A) $( x - 15 ) ^ { 2 }$
B) $( x + 15 ) ^ { 2 }$
C) $( x + 15 ) ( x - 15 )$
D) prime