A hobbyist collected data about the motion of a toy train on a straight track and then recorded the data in the graph below. Which of these accurately describes the motion of the toy train? A) The toy train speeds up while going forward and then slows down. B) The toy train slows down while going forward and then moves backward. C) The toy train moves forward at a constant speed, slows down, and then stops D) The toy train moves forward at an increasing speed, stops, and then moves forward.