Use the Rules of Exponents to Simplify the Expression $\left(\mathrm{r}^{1 / 6_{\mathrm{s}}} 1 / 6\right)^{2}$

Multiple Choice

Use the rules of exponents to simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive real numbers.
- $\left(\mathrm{r}^{1 / 6_{\mathrm{s}}} 1 / 6\right) ^{2}$

A) $r^{1 / 3} s^{1 / 3}$

B) $\mathrm{r}^{1 / 36_{\mathrm{s}} 1 / 36}$

C) $\mathrm{r}^{2} \mathrm{~s}^{2}$

D) $\mathrm{r}^{1 / 12} \mathrm{~s}^{1 / 12}$