Question: An object moving along a straight line is decelerating. Which one of the following statements is necessarily true? The direction of the acceleration is in

An object moving along a straight line is decelerating. Which one of the following statements is necessarily true?
The direction of the acceleration is in the direction opposite to that of the velocity.
The acceleration is must be zero.
The acceleration changes as the object moves along the line.
The value of the acceleration is positive.
The direction of the acceleration is in the same direction as the displacement.

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