Mark the letter A, B, C or D to indicate the sentence that is best written from the words/ phrases given.Câu hỏi Heavy rain / be / the reason / Mid-Autumn Festival I not I take place. A. The heavy rain was the reason why the Mid-Autumn Festival didn’t take place. B. The heavy rain is the reason which the Mid-Autumn Festival didn’t take place. C. The heavy rain was the reason when the Mid-Autumn Festival didn’t take place. D. The heavy rain is the reason why the Mid-Autumn Festival didn’t take place.