[单选题]
15.02: A box uniformly f+zp kpq)l(uj;cr,mkn: 4q;y vs1v cgk2e3.t+e8az k slides 7.50 m to rest across a flat surface in a time of 12.0 s. What was the initial speed of the box when it started its ske+v38k.z1 ac2s te gvlide?
A. 0.313 m/s
B. 0.625 m/s
C. 1.25 m/s
D. 2.50 m/s
E. 5.00 m/s