When the follower is on the base circle of the cam, the pump plunger is at the （） of its stroke.<br>A:top<br>B:middle<br>C:bottom<br>D:any of the above

When the follower is on the base circle of the cam, the pump plunger is at the （） of its stroke.
A:top
B:middle
C:bottom
D:any of the above

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