Factor Assume That Variables Used as Exponents Represent Positive Integers $$25 x ^ { 2 n } - 60 x ^ { n } + 36$$

Multiple Choice

Factor. Assume that variables used as exponents represent positive integers.
- $$25 x ^ { 2 n } - 60 x ^ { n } + 36$$

A) $\left( 5 x ^ { n } - 6 \right) ^ { 2 }$
B) $\left( 25 \mathrm { x } ^ { \mathrm { n } } + 1 \right) \left( \mathrm { x } ^ { \mathrm { n } } + 36 \right)$
C) $\left( 5 x ^ { n } - 6 \right) \left( 5 x ^ { n } + 6 \right)$
D) $\left( 5 x ^ { n } + 6 \right) ^ { 2 }$