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In the following questions, four alternatives are given for the idiom / phrase and bold italicised in the sentence. Choose the alternative which best expresses the meaning of the idiom / phrase.

What is the correct answer?


Adolescence is a period of halcyon days .

A. hard days

B. of mental pressure

C. happy days

D. days of preparation

Please do not use chat terms. Example: avoid using "grt" instead of "great".