Add or Subtract $3 \sqrt{7}+\frac{-6}{\sqrt{7}}$ A) $15 \sqrt{7}$ B) $\frac{15 \sqrt{7}}{7 \sqrt{7}}$ C) $\frac{15 \sqrt{7}}{7}$

Multiple Choice

Add or subtract. Simplify by collecting like radical terms, if possible.
- $3 \sqrt{7}+\frac{-6}{\sqrt{7}}$

A) $15 \sqrt{7}$
B) $\frac{15 \sqrt{7}}{7 \sqrt{7}}$
C) $\frac{15 \sqrt{7}}{7}$
D) $-3 \sqrt{7}$