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

Multiple Choice

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

A) $( x - 4 ) ( x - 4 )$
B) $\left( x ^ { 2 } + 4 \right) \left( x ^ { 2 } - 4 \right)$
C) $( x + 4 ) ( x - 4 )$
D) $( x + 16 ) ( x - 16 )$