A 50.0kg box is being pushed along a horizontal surface by a force of 250N directed 28 degrees below the horizontal. The coefficient of kinetic friction between the box and the surface is 0.300. What is the acceleration of the box?
A) 0.769 m/s^2
B) 1.77m/s^2
C) 3.16m/s^2
D) 6.31m/s^2
E) 8.53m/s^2