Express the Rational Expression in Lowest Terms $\frac{a^{2}-6 a}{(a+2)(a-6)}$ A) $\frac{a-6}{a+2}$ B) $\frac{a^{2}}{a+2}$

Express the rational expression in lowest terms.
- $\frac{a^{2}-6 a}{(a+2) (a-6) }$

A) $\frac{a-6}{a+2}$

B) $\frac{a^{2}}{a+2}$

C) $\frac{a}{a+2}$

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