11. Which of the following statements is correct about an object moving in a constant motion? 1. II. It moves with unchanging speed. It moves with a changing velocity. Its location and arrival is easy to predict. TIL IV. Its instantaneous speed values are always the same. D. II, III, IV A. I, II, III B. I, II, IV C. I, III, IV 12. Which of the following is the unit of acceleration? A m/h B. m/mi C. m/s D. m/s2