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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What is the body's acceleration when $\mathrm { t } = 8 \mathrm { sec }$ ?

A) $0 \mathrm { ft } / \mathrm { sec } ^ { 2 }$
B) $1 \mathrm { ft } / \mathrm { sec } ^ { 2 }$
C) $1.67 \mathrm { ft } / \mathrm { sec } ^ { 2 }$
D) $- 2 \mathrm { ft } / \mathrm { sec } ^ { 2 }$