[单选题]
A wheel accelerates wile*9xqvka 19fing5;ytx.o86/r*7p: rvi9bil yvmrg yh a constant 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
