Write the Expression with Only Positive Exponents and Evaluate If $( - 5 ) ^ { - 2 }$

Multiple Choice

Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real
numbers.
- $( - 5 ) ^ { - 2 }$

A) $- \frac { 1 } { 25 }$
B) 25
C) $\frac { 1 } { 25 }$
D) $- 25$