Simplify Assume That All Variables Represent Positive Real Numbers $\frac{-3}{\sqrt{15}}$ A) $-\frac{\sqrt{15}}{5}$

Multiple Choice

Simplify. Assume that all variables represent positive real numbers.
- $\frac{-3}{\sqrt{15}}$

A) $-\frac{\sqrt{15}}{5}$
B) $\frac{\sqrt{15}}{5}$
C) -3
D) $-\sqrt{3}$