Simplify
- $\left(\frac{5 a}{3}\right)^{4}$ A) $\frac{5 a^{4}}{81}$ B) $\frac{625 a}{81}$ C) $\frac{625 \mathrm{a}^{4}}{3}$ D) $\frac{625 \mathrm{a}^{4}}{81}$

Multiple Choice

Simplify.
- $\left(\frac{5 a}{3}\right) ^{4}$

A) $\frac{5 a^{4}}{81}$
B) $\frac{625 a}{81}$
C) $\frac{625 \mathrm{a}^{4}}{3}$
D) $\frac{625 \mathrm{a}^{4}}{81}$