A rock is thrown upward with an initial speed of 20.0 m/sec. At time 2.00 seconds after it was thrown, which of the following statements is true?
Select one: a. The rock is moving faster than when it was thrown. b. The speed of the rock is zero. c. The rock is at its highest point. d. The rock has passed its highest point and has started on its way downward. e. None of the other statements is true.