Jon and Linda,who Are Both Psychology Majors,are Looking at Photographs

Multiple Choice

Jon and Linda,who are both psychology majors,are looking at photographs of their son Dakota.A number of pictures show Dakota's motor development.Jon comments on the orderly changes in Dakota's development.Linda points out that this orderly sequence of changes in motor development is mostly due to:

A) the cephalocaudal principle
B) the proximodistal principle
C) experience
D) maturation