Factor Completely $200 x ^ { 2 } + 160 x + 32$

Multiple Choice

Factor completely.
- $200 x ^ { 2 } + 160 x + 32$

A) $( 40 x + 16 ) ( 5 x + 2 )$
B) $8 \left( 25 x ^ { 2 } + 20 x + 4 \right)$
C) $8 ( 5 x + 2 ) ^ { 2 }$
D) $8 ( 5 x - 2 ) ( 5 x + 2 )$