Factor the Trinomial Completely $x ^ { 2 } + 9 x + 20$

Multiple Choice

Factor the trinomial completely. $x ^ { 2 } + 9 x + 20$

A) $( x - 4 ) ( x + 5 )$
B) $( x - 4 ) ( x - 5 )$
C) $( x + 4 ) ( x - 5 )$
D) $( x + 4 ) ( x + 5 )$
E) not factorable