Your Textbook Discusses the Fact That Infants of the Kipsigis

Multiple Choice

Your textbook discusses the fact that infants of the Kipsigis people encourage motor skills such as sitting up,standing,and walking shortly after birth.As a result,their children achieve motor development milestones approximately a month earlier than children raised in North America.What does this suggest about motor skill development?

A) Persons of different cultures have genetic factors that influence motor development.
B) Natural selection has allowed the evolution of early motor development in the Kipsigis people because it is adaptive.
C) Environmental factors can modulate early motor development.
D) Environmental factors can cause the rapid acceleration of motor development.