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Which of the following statements, if any, is true? A.If an objects speed is constant than...

Which of the following statements, if any, is true?

A.If an objects speed is constant than its acceleration must be zero.

B. If an object velocity is zero, then its acceleration must be zero

C. If an objects acceleration is zero, then its velocity must be zero

D. If an objects acceleration is constant, then its velocity must be constant.

E. None are true

Please explain

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