I know the answer is E but I don't know how to get to it. Can someone help me with clear steps of how to get to the answer.

7. A worker exerts a force of magnitude F at an angle 0 downwards from the horizontal on a box of mass m as it moves a distance d to the right across a rough surface. The coefficient of kinetic friction between the box and the surface is uk, and the acceleration due to gravity is g. Which of the following is the correct expression for the change AK in the box's kinetic energy during this process? Here, it may help to assume the system is the box, the surface, and Earth, while the worker and associated force are in the environment. m A. AK = HK(F sin 0 + mg)d B AK = -Hx(F sin 0 + mg)d C. AK = F cos ed D. AK = (F cos 0 - Hxmg)d E. AK = (F cos 0 - HKF sin 0 - Ukmg)d