$\frac{x^{2}+8 x+15}{x^{2}+10 x+21} \cdot \frac{x^{2}+9 x+14}{x^{2}+7 x+10}$ A) $\frac{x+5}{x+7}$ B) 1

C)

Multiple Choice

$\frac{x^{2}+8 x+15}{x^{2}+10 x+21} \cdot \frac{x^{2}+9 x+14}{x^{2}+7 x+10}$

A) $\frac{x+5}{x+7}$

B) 1

C) $\frac{x+7}{x+2}$

D) $\frac{1}{x+2}$