Core-Knowledge Theorists View the Fact That Virtually All Children in All

Core-knowledge theorists view the fact that virtually all children in all societies master the basic grammar of their native language quickly and effortlessly as evidence of:

A) children's overwhelming ability to learn vast arrays of new information even when there is no prior knowledge.
B) the existence of a specialized language-learning mechanism.
C) the powerful effect of early social interactions.
D) the existence of specialized learning mechanisms for any number of domains.