Simplify the Expression $\left(3 m^{4} n^{-2}\right)^{2}$ A) $\frac{3 m^{8}}{n^{4}}$ B) $3 m^{8} n^{4}$

Multiple Choice

Simplify the expression. Write the result without using negative exponents. (Assume all variables represent nonzero real numbers.)
- $\left(3 m^{4} n^{-2}\right) ^{2}$

A) $\frac{3 m^{8}}{n^{4}}$
B) $3 m^{8} n^{4}$
C) $9 m^{8} n^{4}$
D) $\frac{9 m^{8}}{n^{4}}$