Change the Logarithmic Expression to an Equivalent Expression Involving an Exponent

Multiple Choice

Change the logarithmic expression to an equivalent expression involving an exponent.
- $\log _ { 1 / 3 } 9 = - 2$

A) $\left( \frac { 1 } { 3 } \right) ^ { 2 } = 9$
B) $\left( \frac { 1 } { 3 } \right) ^ { - 2 } = 9$
C) $( - 2 ) ^ { 1 / 3 } = 9$
D) $9 ^ { 1 / 3 } = 2$