Factor Completely $x^{4}-81$ A) $\left(x^{2}-9\right)(x+3)(x-3)$ B) Prime
C) $(x+3)^{2}(x-3)^{2}$ D) $\left(x^{2}+9\right)(x+3)(x-3)$

Multiple Choice

Factor completely.
- $x^{4}-81$

A) $\left(x^{2}-9\right) (x+3) (x-3)$
B) Prime
C) $(x+3) ^{2}(x-3) ^{2}$
D) $\left(x^{2}+9\right) (x+3) (x-3)$