The integral $\begin{align*} \int \frac{2x^{12} + 5x^9}{(x^5 + x^3 + 1)^3} dx \end{align*}$ is equal to : <br> where C is an arbitrary constant.

Question

( A ) $\frac{x^{5}}{2(x^5 + x^3 + 1)^2} + C$
( B ) $\frac{-x^{5}}{2(x^5 + x^3 + 1)^2} + C$
( C ) $\frac{-x^{10}}{2(x^5 + x^3 + 1)^2} + C$
( D ) $\frac{x^{10}}{2(x^5 + x^3 + 1)^2} + C$