Simplify the Expression $25^{-1 / 2}$ A) 5
B) -5
C) $\frac{1}{5}$

Simplify the expression. Assume all variables represent nonnegative real numbers.
- $25^{-1 / 2}$

A) 5
B) -5
C) $\frac{1}{5}$
D) $-\frac{1}{5}$