$\Large \int e^x\bigg(\frac{1-x}{1+x^2}\bigg)^2 \normalsize dx$ is equal to

Question

$\begin{array}{1 1} (A)\;\frac{e^x}{1+x^2}+C & (B)\;\frac{-e^x}{1+x^2}+C\\(C)\;\frac{e^x}{(1+x^2)^2}+C & (D)\;\frac{-e^x}{(1+x^2)^2}+C \end{array}$