Two Wheels with Identical Moments of Inertia Are Rotating About

Multiple Choice

Two wheels with identical moments of inertia are rotating about the same axle.The first is rotating clockwise at 2.0 rad/s,and the second is rotating counterclockwise at 6.0 rad/s.If the two wheels are brought into contact so that they rotate together,their final angular velocity will be

A) 2.0 rad/s,counterclockwise.
B) 3.0 rad/s,clockwise.
C) 4.0 rad/s,counterclockwise.
D) 5.0 rad/s,clockwise.
E) 6.0 rad/s,clockwise.