Choose the sentence (A, B, C or D) that is closest in meaning to the root sentence. Câu hỏi My mother taught my younger sister to speak English when she was only 5. A. My younger sister could speak English at the age of five. B. My younger sister can speak English at the age of five. C. My younger sister was able speak English at the age of five. D. My younger sister must speak English at the age of five.