[单选题]
12.25: Which one of the ftieqx,*s3ts1 v1 z:etollowing choices best representp -lbe3-0 rctus the average angular speed of the hour hand on a standard clock (in upelt u-rc3b0-nits of rad/s)?
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}$
