Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.Câu hỏi My younger sister doesn’t often get up early in the morning. A. My younger sister used to get up early in the morning. B. My younger sister is used to get up early in the morning. C. My younger sister isn’t used to getting up early in the morning. D. My younger sister used to getting up early in the morning.