$\begin{align*} \int e^{x \log a}. e^x \;dx \end{align*}$ is equal to :

Question

( A ) $\frac{a^x}{\log_a e} + c$
( B ) none of these
( C ) $(ae)^x+c$
( D ) $\frac{e^x}{1+\log_e a}+c$