Use the Properties of Exponents to Simplify the Expression $\left( r ^ { 1 / 3 } \cdot s ^ { 1 / 3 } \right) ^ { 2 }$

Multiple Choice

Use the properties of exponents to simplify the expression. Write with positive exponents.
- $\left( r ^ { 1 / 3 } \cdot s ^ { 1 / 3 } \right) ^ { 2 }$

A) $r ^ { 1 / 6 } s ^ { 1 / 6 }$
B) $r ^ { 1 / 9 } s ^ { 1 / 9 }$
C) $r ^ { 2 } s ^ { 2 }$
D) $\mathrm { r } ^ { 2 / 3 } \mathrm {~s} ^ { 2 / 3 }$