Betsy Notices That Her Infant Gained Control of the Muscles

Multiple Choice

Betsy notices that her infant gained control of the muscles in his upper arms and then his lower arms,wrist,hands,and and,finally his fingers.This pattern she observed is referred to as the

A) proximodistal pattern.
B) cephalocaudal pattern.
C) zone of proximal development.
D) one-step-ahead pattern.