A block of mass M on a horizontal surface is attached to a horizontal spring of negligible mass. The other end of the spring is attached to a wall, and there is negligible friction between the block and the horizontal surface. The object is displaced from the object-spring’s equilibrium position and released from rest so that the system oscillates. A student collects data about the object’s horizontal displacement x , velocity vx , acceleration ax , and the net force Fx exerted on the object as the object oscillates. Which of the following graphs, with appropriate evidence, could the student be able to create from the data to explain that the object undergoes simple harmonic motion?