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【单选题】
The figure shows a position-versus-time graph of the motion of a car. Describe the velocity and acceleration during segments OA, AB, and BC. Which item is Not correct?【图片】A.
In segment OA, the velocity is positive and constant.
B.
In segment OA, there is no acceleration.
C.
In segment AB, the velocity is increasing.
D.
In segment AB, there must be acceleration.
E.
In segment BC, the velocity is not constant.
F.
In segment BC, this velocity is greater in magnitude than the velocity in segment OA.
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