Completely Factor the Polynomial or State That the Polynomial Is $$x ^ { 2 } + 20 x + 100$$

Multiple Choice

Completely factor the polynomial or state that the polynomial is prime.
- $$x ^ { 2 } + 20 x + 100$$

A) $( x + 10 ) ( x - 10 )$
B) $( x - 10 ) ^ { 2 }$
C) $x ^ { 2 } + 20 x + 100$
D) $( x + 10 ) ^ { 2 }$