She should not be worried since some babies do not crawl because
every child have different progress in their growth. There are Four Stages of
Cognitive Development; Sensorimotor (0-2 years), Preoperational (2-7 years), Concrete-operational
(7-11 years), Formal Operations (11+ years). It should be keep in mind the child's
stage of cognitive development.
D: The United States was meant to stretch from the Atlantic ocean to the Pacific ocean
