Question

the concept of a sensitive period for language learning in humans means that:

a.if language is not learned by a certain age, it will never be learned

b.first languages can be learned at any age, but second languages must be acquired by middle adulthood

c.if a first language is not learned by a certain age, language acquisition will become more difficult

d.vocabulary can be learned at any age, but there is a small window during development when grammar can be acquired

Answer

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