Consider the integral

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{6x}{(x-1)(x+2)}dx$

which partial fractions are used in the following integral?

$\frac{4}{2+x}+\frac{2}{x-1}$

$\frac{2}{2+x}+\frac{4}{x-1}$

$\frac{2}{2+x}+\frac{2}{x-1}$