Thelen's Important Contribution to Our Understanding of Motor Development Was

Thelen's important contribution to our understanding of motor development was that an infant's reflexes:

A) don't necessarily disappear, because they're affected by the weight of their limbs
B) don't necessarily disappear, because they're not affected by the weight of their limbs
C) do disappear, and then reappear as more integrated movement later
D) do disappear, and do not return in a comparable form