Question

According to the critical period hypothesis, children will never learn to use language normally unless they are exposed to language by
A.age 1 or 2 years.
B.age 4 or 5 years.
C.age 12 or 13 years.
D.adulthood.

Answer 1

children Have to be exposed to language as young as age one to two years old. the younger, the better! 
Happy to help you! :)

Answer 2

The answer is age 4 or 5 years