Simplify and Write with Positive Exponents Only $- 5 z ^ { - 3 }$

Multiple Choice

Simplify and write with positive exponents only.
- $- 5 z ^ { - 3 }$

A) $\frac { - 125 } { z ^ { 3 } }$
B) - $\frac { 1 } { 125 z ^ { 3 } }$
C) - $\frac { 5 } { z ^ { 3 } }$
D) $\frac { 1 } { 125 z ^ { 3 } }$