Factor the Trinomial Completely $a ^ { 2 } + 11 a + 24$

Multiple Choice

Factor the trinomial completely. $a ^ { 2 } + 11 a + 24$

A) $( a + 3 ) ( a - 8 )$
B) $( a - 3 ) ( a - 8 )$
C) $( a + 3 ) ( a + 8 )$
D) $( a - 3 ) ( a + 8 )$
E) not factorable