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

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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When is the body moving backward?

A) $8 < t < 9$
B) $2 < t < 3,4 < t < 5,7 < t < 9$
C) $2 < t < 3,4 < t < 5,7 < t < 8$
D) $8 < t \leq 10$