Factor, Using the Given Factor $x ^ { - 8 } - 6 x ^ { - 4 } ; \quad x ^ { - 8 }$

Multiple Choice

Factor, using the given factor. Assume all variables represent positive real numbers.
- $x ^ { - 8 } - 6 x ^ { - 4 } ; \quad x ^ { - 8 }$

A) $x ^ { - 8 } \left( 1 + 6 x ^ { 6 } \right)$
B) $x ^ { - 8 } \left( x - 6 x ^ { 5 } \right)$
C) $x ^ { - 8 } \left( 1 - 6 x ^ { 4 } \right)$
D) $x ^ { - 8 } \left( x - 6 x ^ { 4 } \right)$