A Toy Train Moves with Uniform Speed on a Circular

Multiple Choice

A toy train moves with uniform speed on a circular track.Which of the following statements is true?

A) The angular acceleration is always positive.
B) The angular acceleration is always negative.
C) The angular acceleration can either be positive or negative,depending if the train runs clockwise or counter-clockwise.
D) The centripetal acceleration is 0.
E) The centripetal acceleration does not change in magnitude.