What Is Meant by the Notion of a Critical Period

Multiple Choice

What is meant by the notion of a critical period for language acquisition?

A) It is the period of transition between one-word and two-word utterances.
B) It is the time in one's childhood in which one is particularly sensitive to language cues and most easily acquires language.
C) It is the period isolated children spend by themselves before someone teaches them a language.
D) It is the period between six and ten years of age in which certain complex aspects of syntax are learned.