[单选题]
A child falls sideways off a sled while sledz;2drmhfo: plc; x2w.dya(-v - zd*jbiing on frictionless ice. What happens to the velocitb( jvdy*- -izay of the sled?
A. It increases.
B. It remains the same.
C. It decreases.
D. cannot be determined from the information given
