[单选题]
12.25: Which one of tjlrk/2aaat )0 he fzc:yl *n*.b+x pre*dvollowing choices best represents the average angular speed of the hour hand on a standard clock (in units of rad/s)l+zx :ecr*y.vpn d*b* ?
A. $5.24× 10^{-1}$
B. $2.62× 10^{-1}$
C. $1.75× 10^{-3}$
D. $1.45× 10^{-4}$
E. $ 7.27× 10^{-5}$
