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If $f(x) $ is a differentiable function, which of the following statements is true?

I. $\cfrac { d }{ dx } \displaystyle\int _{ 2 }^{ 0 }{ f( t ) dt=-f( x ) } $

II. $\cfrac { d }{ dx } \displaystyle\int _{ 2 }^{ x }{ { f }^{ \prime } } ( t ) dt={ f }^{ \prime }( x ) $

III. $\cfrac { d }{ dx } \displaystyle\int _{ 2 }^{ x }{ { f } } ( t ) dt={ f }( x ) $

A

I only.

B

II only.

C

l and III only.

D

II and III only.

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