What is the completely factored form of this polynomial?
81x4-16y4
O A.
(3x² + 2y²) (9x + 4y)(9x - 4y)
B.
(9x² + 4y²) (9x² - 4y²)
OC. (9x² + 4y²)(3x – 2y)²
-
OD. (9x² + 4y²)(3x + 2y)(3x - 2y)