Simplify
- $\frac{3 m^{2}+3 m}{15 m^{2}+21 m}$ A) $\frac{m^{2}+1}{5 m^{2}+7}$ B) $\frac{m+1}{5 m+7}$

Multiple Choice

Simplify.
- $\frac{3 m^{2}+3 m}{15 m^{2}+21 m}$

A) $\frac{m^{2}+1}{5 m^{2}+7}$
B) $\frac{m+1}{5 m+7}$
C) $\frac{m+1}{m+7}$
D) $\frac{m+3}{5 m+7}$