Completely Factor the Polynomial or State That the Polynomial Is $$x ^ { 2 } - 8 x + 16$$

Multiple Choice

Completely factor the polynomial or state that the polynomial is prime.
- $$x ^ { 2 } - 8 x + 16$$

A) $( x - 4 ) ^ { 2 }$
B) $( x - 8 ) ( x + 8 )$
C) $( x + 4 ) ^ { 2 }$
D) $( x - 4 ) ( x + 4 )$