Perform the Indicated Operation $\frac{\mathrm{k}^{2}+8 \mathrm{k}+15}{\mathrm{k}^{2}+12 \mathrm{k}+35} \cdot \frac{\mathrm{k}^{2}+13 \mathrm{k}+42}{\mathrm{k}^{2}+9 \mathrm{k}+18}$

Multiple Choice

Perform the indicated operation. Give the answer in lowest terms.
- $\frac{\mathrm{k}^{2}+8 \mathrm{k}+15}{\mathrm{k}^{2}+12 \mathrm{k}+35} \cdot \frac{\mathrm{k}^{2}+13 \mathrm{k}+42}{\mathrm{k}^{2}+9 \mathrm{k}+18}$

A) $\frac{k+3}{k+7}$
B) $\frac{\mathrm{k}+7}{\mathrm{k}+6}$
C) 1
D) $\frac{1}{\mathrm{k}+6}$