Factor the Greatest Common Factor from the Polynomial $12 x ^ { 3 n } - 30 x ^ { 2 n }$

Multiple Choice

Factor the greatest common factor from the polynomial. Assume any variable exponents represent whole numbers.
- $12 x ^ { 3 n } - 30 x ^ { 2 n }$

A) $6 x ^ { 3 } n \left( 2 x ^ { n } - 5 \right)$
B) $6 x ^ { n } \left( 2 x ^ { 2 n } - 5 x ^ { n } \right)$
C) $6 x ^ { 2 n } \left( 2 x ^ { n } - 5 x \right)$
D) $6 x ^ { 2 n } \left( 2 x ^ { n } - 5 \right)$