Block A is placed on a rough surface inclined at an angle θ above the horizontal. A taut string connects block A over a pulley to block B, which hangs from the string, as shown below. The masses of blocks A and B are MA and MB, respectively. At time t=0, block A is sliding up the slope as block B falls, and the blocks are both slowing down. Assume that the mass and friction of the pulley are negligible. Block A is placed on a rough surface inclined at an angle theta from the horizontal. Block A is connected to block B with a taut string that runs over a pulley at the top edge of the incline. Block B hangs vertically from the string. Block A has a mass of M sub A and block B has a mass of M sub B. An arrow next to block A is directed diagonally up the inclined surface and parallel to the surface. The arrow is labeled “Initial Velocity.” The two blocks eventually stop and reverse direction. Which of the following graphs best predicts the acceleration of block A as it moves up and down the rough, inclined surface? Assume that the positive direction points down the slope.