Factor the Trinomial Completely $x ^ { 2 } - 10 x + 16$

Multiple Choice

Factor the trinomial completely. $x ^ { 2 } - 10 x + 16$

A) $( x + 2 ) ( x + 8 )$
B) $( x - 2 ) ( x - 8 )$
C) $( x + 2 ) ( x - 8 )$
D) $( x - 2 ) ( x + 8 )$
E) not factorable