[单选题]
An object moves with a consta ud+ k.am7x)irnt speed of 30 m/s on a circuo+qjf1 fw +7 e:yqj,l1nlcpymt+4 l/alar track of radius 150 m. What is the accelerati,+ mf4f :tl1j qa+/+p7jlnolycqe y1won of the object?
A. zero
B. $0.17 \; m/s^2$
C. $5.0 \; m/s^2$
D. $6.0 \; m/s^2$
