An Infant Who Is Using Social Referencing Would Learn

An infant who is using social referencing would learn:

A) not to crawl down a steep incline by seeing another infant fall.
B) to crawl around an obstacle by seeing an adult crawl around the obstacle.
C) to avoid crawling off the side of a bed by seeing an adult's fearful facial expression.
D) to crawl more quickly because her parents provide a lot of encouragement.