Multiple Choice
According to Adolph, Vereijken, and Denny (1998) , what do the keys to crawling include?
A) A strict progression of obligatory stages
B) The use of one or two prescribed crawling postures
C) Experience that is directly related to speed and efficientcy of crawling development
D) All of the above
E) None of the above
Correct Answer:

Verified
Correct Answer:
Verified
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