Rewrite the Expression Without Using Negative Exponents $\frac { 1 } { x ^ { - 3 } }$

Multiple Choice

Rewrite the expression without using negative exponents. (Assume all variables represent nonzero real numbers.)
- $\frac { 1 } { x ^ { - 3 } }$

A) $x ^ { 3 }$
B) $x ^ { - 3 }$
C) $3 x$
D) $\frac { 1 } { x ^ { 3 } }$