[单选题]
15.02: A box uniformly slicut p/n9a bo*o y+3eu6des 7.50 m to rvn pvr,j,5mrlr; e +29wjp7lvest across a flat surface in a time of 12.0 s. What was the initial speed of the boxrpvl27,wv lvpr nr9 ;je m5+j, when it started its slide?
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