Raise to the Power or Find the Root $\left( \frac { 1 } { 64 } \right) ^ { - 1 / 3 }$

Multiple Choice

Raise to the power or find the root. Assume that all variables represent positive real numbers. Write with only positive
exponents.
- $\left( \frac { 1 } { 64 } \right) ^ { - 1 / 3 }$

A) $- \frac { 1 } { 4 }$
B) $\frac { 1 } { 4 }$
C) $- 4$
D) 4