Factor by Any Method $$x ^ { 6 } - 1$$

Multiple Choice

Factor by any method.
- $$x ^ { 6 } - 1$$

A) $\left( x ^ { 2 } + 1 \right) \left( x ^ { 4 } - x ^ { 2 } + 1 \right)$
B) $( x + 1 ) ( x - 1 ) \left( x ^ { 2 } + x + 1 \right) \left( x ^ { 2 } - x + 1 \right)$
C) $( x + 1 ) ( x - 1 ) \left( x ^ { 4 } + x ^ { 2 } + 1 \right)$
D) $\left( x ^ { 3 } + 1 \right) \left( x ^ { 3 } - 1 \right)$