Raise to the Power or Find the Root $\left( \frac { 1 } { 9 } \right) ^ { 1 / 2 }$

Multiple Choice

Raise to the power or find the root. Assume that all variables represent positive numbers. Write with only positive
exponents.
- $\left( \frac { 1 } { 9 } \right) ^ { 1 / 2 }$

A) 3
B) $- \frac { 1 } { 3 }$
C) $\frac { 1 } { 3 }$
D) $- 3$