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

Multiple Choice

Mentally factor the trinomial $x ^ { 2 } - 10 x + 16$

A) $( x + 4 ) ( x + 4 )$
B) $( x - 4 ) ( x - 4 )$
C) $( x + 2 ) ( x - 8 )$
D) $( x - 2 ) ( x - 8 )$
E) $( x + 2 ) ( x + 8 )$