Factor as Completely as Possible $$x ^ { 3 } + 2 x ^ { 2 } - 16 x - 32$$

Multiple Choice

Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.
- $$x ^ { 3 } + 2 x ^ { 2 } - 16 x - 32$$

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