Write the Expression with Only Positive Exponents and Evaluate If $$\left( \frac { 1 } { 3 } \right) ^ { - 4 }$$

Multiple Choice

Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real
numbers.
- $$\left( \frac { 1 } { 3 } \right) ^ { - 4 }$$

A) 81
B) $- 81$
C) $\frac { 1 } { 81 }$
D) $- \frac { 1 } { 81 }$