A student collects position-time data for an object moving along the -axis, and determines that the motion corresponds closely with a mathematical model of , where is in meters and is in seconds. Assuming that the object moves according to this model, it can be determined that
(A) at time , the object was at the origin.
(B) at time , the object has an initial velocity of 1.0 m/s.
(C) at time , the object had an initial acceleration of 1.5 m/s².
(D) during the motion, the acceleration of the object varied according to time-squared
(E) none of these