Write as a Real Number or a Product of a Real

Multiple Choice

Write as a real number or a product of a real number and i.
- $\frac { \sqrt { - 200 } } { \sqrt { - 8 } }$

A) 5
B) $5 \mathrm { i }$
C) $25 \mathrm { i }$
D) $- 5 \mathrm { i }$