In a merry-go-round has an angular velocity of -0.5 rads/s and an angular acceleration of 0.2 rad/s². What is the acceleration in the radial direction at 3 m from the center?
(a) 0.5 m/s²
(b) 1.5 m/s²
(c) 0.75 m/s²
(d) None of the above