QUESTION 12 Velocity vo. Time Velocity (m/) The velocity vs. time graph above is made to represent the motion of a cart. Which of the following accurately describes the motion of this cart? (The positive direction is "forward." the negative direction is "backward.") O a. The cart is moving backward and speeding up O b. The cart is moving backward and slowing down. O c. The cart is moving forward and slowing down. ) d. The cart is moving forward at a constant speed Oe. The cart is moving backwards at a constant speed