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

Multiple Choice

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

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