Explain why the answer is not B and the correct answer

13. A ball is suspended by a lightweight string, as shown in the figure on the right. The ball is displaced to position 1 and released. The four labeled positions are evenly spaced along the arc of the ball's motion. Between which adjacent pairs of positions is the change in kinetic energy of the ball greatest? (A) 1 and 2 (B) 2 and 3 Sheswol of fesses C) 3 and 4 (D) The change is the same for all adjacent pairs