Write with Positive Exponents $32 ^ { - 4 / 5 }$

Multiple Choice

Write with positive exponents. Simplify if possible.
- $32 ^ { - 4 / 5 }$

A) 16
B) $\frac { 1 } { 16 }$
C) $- \frac { 1 } { 16 }$
D) not a real number