Write the Number as a Product of a Real Number $i$

Multiple Choice

Write the number as a product of a real number and $i$ . Simplify the radical expression.
- $\sqrt{-2500}$

A) $50 \mathrm{i}$
B) $-50 \mathrm{i}$
C) $\mathrm{i} \sqrt{50}$
D) ± 50