Factor the Trinomial Completely $x ^ { 2 } - 7 x - 18$

Multiple Choice

Factor the trinomial completely. $x ^ { 2 } - 7 x - 18$

A) $( x + 9 ) ( x + 2 )$
B) $( x - 9 ) ( x + 2 )$
C) $( x - 9 ) ( x - 2 )$
D) $( x + 9 ) ( x - 2 )$
E) not factorable