[单选题]
A wheel accelerates wilw:uon8b8jp5,k qw -vhuz) (xth a constant v.mgz *l+sl3- ;gnqtru)firy 1rg 9x.angular acceleration of $4.5 rad/s^2$. If the initial angular velocity is 1.0 rad/s, what is the angular velocity at t = 2.0 s?
A. 1.0 rad/s
B. 7.0 rad/s
C. 9.0 rad/s
D. 10 rad/s
