An object, which is considered a rigid body, is not in equilibrium. Which one of the following statements must be true concerning the magnitude of the angular acceleration α and translational acceleration a of the object?
A) α > 0 rad/s², but a = 0 m/s²
B) Either α > 0 rad/s² or a > 0 m/s²
C) a > 0 rad/s², but a > 0 m/s²
D) α > 0 rad/s², but a = 0 m/s²
E) α = 0 rad/s² and a = 0 m/s²