A 10 Kg Solid Cylinder (I = 1/2 MR²)with a Radius

Multiple Choice

A 10 kg solid cylinder (I = 1/2 MR²) with a radius of 30.0 cm is rotating about a vertical axis through its center.If the angular momentum is increasing at the rate of 25.0 kg m²/s,then what is the angular acceleration?

A) 75.3 rad/s²
B) 65.9 rad/s²
C) 55.6 rad/s²
D) 40.5 rad/s²
E) 35.2 rad/s²