Simplify the Expression $\left( n ^ { 9 } \right) ^ { - 3 }$

Multiple Choice

Simplify the expression. Write the result without using negative exponents. (Assume all variables represent nonzero
real numbers.)
- $\left( n ^ { 9 } \right) ^ { - 3 }$

A) $\frac { 1 } { n ^ { 27 } }$

B) $n ^ { 6 }$

C) $n ^ { 27 }$

D) $\frac { 1 } { n ^ { 6 } }$