Mark the letter A, B, C or D to indicate the sentence that is best written from the words/phrases given.Câu hỏi wait/ him/ since 8 o ’clock. A. I have waited for him since 8 o'clock. B. I am waiting for him since 8 o'clock. C. It has been waited for him since 8 o'clock. D. It has been being waited for him since 8 o'clock.