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 standing still?

A) $\mathrm { t } = 3 , \mathrm { t } = 5 , \mathrm { t } = 8$
B) $8 < t \leq 10$
C) $1 < t < 2$
D) $2 < \mathrm { t } < 3,4 < \mathrm { t } < 5,7 < \mathrm { t } < 9$