The Graph of the Velocity of a Rocket (On the Vertical

Multiple Choice

The graph of the velocity of a rocket (on the vertical axis) vs.time (on the horizontal axis) is a straight line that does not go through the origin and does not have a slope of zero.Which statement is true?

A) Its position is always zero.
B) Its speed is always zero.
C) Its acceleration is not zero.
D) Its velocity is constant.