The Lower Leg Rotates with a Constant Angular Velocity About

The lower leg rotates with a constant angular velocity about the knee. Which of the following statements is true in this situation?

A) The limb's angular acceleration is zero, but its centripetal acceleration and tangential acceleration are not zero
B) The limb's angular acceleration and centripetal acceleration are zero, but its tangential acceleration is not zero
C) The limb's angular acceleration is zero, its centripetal acceleration is not zero, and it's tangential acceleration is zero
D) The limb's angular acceleration, centripetal acceleration, and tangential acceleration are all zero
E) The limb's angular acceleration, centripetal acceleration, and tangential acceleration are all not zero