A block accelerates from rest until it reaches a maximum speed, and then stops accelerating. Which of the following statements about the net work done on the block are correct? Assume frictional forces are negligible. The net work on the block is non$-$zero the entire time. Option A$,$The net work on the block is non$-$zero the entire time. Non$-$zero net work is being done on the block only when it is accelerating. Option B$,$Non$-$zero net work is being done on the block only when it is accelerating. Non$-$zero net work is being done on the block only when it is moving with constant speed. Option C$,$Non$-$zero net work is being done on the block only when it is moving with constant speed. Non$-$zero net work could be done on the block either when it is accelerating or when it is moving with constant speed, depending on the values of the block$$s mass, acceleration, and maximum speed.