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

Multiple Choice

Factor completely. If the polynomial cannot be factored, write ʺprime.ʺ
- $$x ^ { 4 } - 81$$

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