[单选题]
An object moves with a cc040 y/ j .feixxgnf,+r,qlxwonstant speed of 30 m/s on a circular track of o+mjauzjrv*v42aij 1p-7-q r radius 150 m. What is the acceleration 2qrjijv+zopv1 a -raj u-* 74mof the object?
A. zero
B. $0.17 \; m/s^2$
C. $5.0 \; m/s^2$
D. $6.0 \; m/s^2$
