Which of the following statements are true about circular motion?

(A) If a particle is moving with constant speed on a circle then its total acceleration is zero.

(B) If a particle moves along a circle with increasing speed then the angle between total acceleration vector and velocity vector is acute angle.

(C) If a particle moves along a circle with constant speed then tangential acceleration and angular accelerations are zero but centripetal acceleration is not zero

(D) If a particle moves along a circle with speed which is directly proportional to time t, then tangential acceleration is constant but centripetal acceleration is not constant.