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

Multiple Choice

Factor completely. If the polynomial cannot be factored, write ʺprime.ʺ
-x⁶ - 8

A) $\left( x ^ { 2 } + 2 \right) \left( x ^ { 4 } - 2 x ^ { 2 } + 4 \right)$
B) $( x - 2 ) \left( x ^ { 5 } + 2 x + 4 \right)$
C) $\left( x ^ { 2 } - 2 \right) \left( x ^ { 2 } + 2 x + 4 \right)$
D) $\left( x ^ { 2 } - 2 \right) \left( x ^ { 4 } + 2 x ^ { 2 } + 4 \right)$