Directions: Fill in the blank in each of the following statements with one word, the first letter of which is already given as a clue. Note that you are to fill in ONE word only, and you are not allowed to change the letter given.

The c period hypothesis refers to a period in one's life experience extending from about age two to puberty, during which the human brain is most ready to acquire a particular language and language learning can proceed easily, swiftly, and without explicit instruction.