[单选题]
A bicycle wheel rotates ueu 5obxly 2w*0h.he9bs8q5tfnjr e) nt1sfr.*p6gz;6 oo6thmbn c(1oiformly through 2.0 revolutions in 4.0 s. What is the averagehz*ro og 1666n(rc.mfop jt 1net);sb angular speed of the wheel?
A. 0.79 rad/s
B. 1.6 rad/s
C. 3.1 rad/s
D. 6.3 rad/s
