A) if the velocity of a particle is constant, then the average velocities for different intervals would be different

B) if the velocity of a particle is constant then the average velocities for different instants would be same

C) if the average velocity of a moving particle  is zero for time interval , then the instataneous velocity at all the instants within this interval may be zero

D) if the average velocity of  a moving particle is zero for a time interval , then the instantaneous velocity at some instants within this interval may be zero.

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