Write with Positive Exponents $$- 243 ^ { - 4 / 5 }$$

Multiple Choice

Write with positive exponents. Simplify if possible.
- $$- 243 ^ { - 4 / 5 }$$

A) $\frac { 1 } { 81 }$
B) 81
C) $- \frac { 1 } { 81 }$
D) not a real number