Simplify Write the Answer in Exponential Form Without Negative Exponents $\left( x ^ { 1 / 3 } \right) ^ { - 3 }$

Multiple Choice

Simplify. Write the answer in exponential form without negative exponents.
- $\left( x ^ { 1 / 3 } \right) ^ { - 3 }$

A) x
B) $\frac { 1 } { x }$
C) $\mathrm { x } ^ { 1 / 9 }$
D) $\frac { 1 } { x ^ { 9 } }$