Factor by Any Method $$81 x ^ { 2 } - 16$$

Multiple Choice

Factor by any method.
- $$81 x ^ { 2 } - 16$$

A) $( 9 x - 4 ) ^ { 2 }$
B) $( 9 x + 4 ) ^ { 2 }$
C) $( 81 x + 1 ) ( x - 16 )$
D) $( 9 x + 4 ) ( 9 x - 4 )$