A CD Has a Diameter of 12

Multiple Choice

A CD has a diameter of 12.0 cm. If the CD starts from rest and has a constant angular acceleration of 2.0 rad/sec², then the angular velocity of the CD after 3.0 sec is

A) 12 rad/s.
B) 10 rad/s.
C) 9.0 rad/s.
D) 8.0 rad/s.
E) 6.0 rad/s.