Four toy cars travel along the same straight track. Their velocities at a given instant are listed below, with positive values toward the east:
I. +3.0m/s
II. −4.5m/s
III. +2.0m/s
IV. −1.0m/s
Which ranking orders the cars from greatest speed to least speed at that instant?
a) I > II > III > IV
b) II > I > III > IV
c) IV > III > I > II
d) I > III > II > IV