One Difference in the Stepping Reflex in Premature Infants Compared

One difference in the stepping reflex in premature infants compared to full term infants is:

A) "preemies" tend to step in a tiptoe manner while full term babies step heel to toe.
B) full term babies tend to step in a tiptoe manner while "preemies" step heel to toe.
C) "preemies" have to be on a moving surface before they will exhibit the stepping reflex.
D) "preemies" don't show the stepping reflex until they are at least a month old.