Find the Least Common Denominator for the Group of Denominators $2 a+14, a^{2}+7 a$

Multiple Choice

Find the least common denominator for the group of denominators.
- $2 a+14, a^{2}+7 a$

A) $2 a^{2}+7$
B) $2 \mathrm{a}+7$
C) $2 a(a+7)$
D) $2 a^{2}+14$