Krisnald05viz Krisnald05viz Science Answered 12. When can we say that an object is accelerating?1. There is a change in speed.III. There is a constant speed.II. There is a change in directionIV. There is a change in velocityA. I, II, III, IVB. I, II, IIIC. I, II, IVD. II, III, IV