Fill in the Missing Factor $7 x ^ { 2 } + 16 x + 4 = ( x + 2 ) ( \_ )$

Fill in the missing factor. $7 x ^ { 2 } + 16 x + 4 = ( x + 2 ) ( \_ )$

A) x+2
B) 7x+2
C) x-2
D) 7x-2
E) 7x