The Figure Shows the Velocity V or Position S of a Body

Multiple Choice

The figure shows the velocity v or position s of a body moving along a coordinate line as a function of time t . Use the
figure to answer the question.
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$$\text { When does the body reverse direction? }$$

A) t = 7 sec
B) t = 4 sec
C) t = 4, t = 7 sec
D) t = 2, t = 3, t = 5, t = 6, t = 7 sec