A box sits at the top of an unfolding ramp. As the ramp isgradually tilted down from horizontal, the box will eventuallystart to slide down the ramp, the ramp then stops further tiltingand is held at this angle. Considering friction realistically, oncethe box starts to slide, it is most-likely to then:

a. Continue to slide at a speed increasing with constantacceleration

b. Come to a rest in a short distance due to the differencebetween static and kinetic friction coefficient

c. Continue to slide with increasing acceleration

d. Continue to slide to a constant speed because of friction andthe ramp tilt has stopped increasing