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Given the graph of $f^\prime(x)$, determine which of the following statements must be true.

I. $f(x)$has a relative minimum at $x=-\frac{5}{3}$.
II. $f(x)$is concave down on the interval $(-2,2)$.
III. $f(x)$is differentiable on the interval $(-3,3)$.

A

I only.

B

II only.

C

I and II only.

D

I and III only.

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