A $2\mathrm{.}2$ kg block starts from rest on a rough inclined plane that makes an angle of $25$ with the horizontal. The coefficient of kinetic friction is $0\mathrm{.}25.$ As the block slides $2\mathrm{.}0$ m down the plane, the mechanical energy of the Earth$-$block system changes by:

A$)-11$ J

B$)0$ J

C$)9\mathrm{.}8$ J

D$)-18$ J

E$)-9\mathrm{.}8$ J