Chọn câu đồng nghĩa

 I can’t help him if he doesn’t tell me about his family. (2.5 Điểm)
A. Unless he tells me about his family, I can’t help him.
B. Unless he told me about his family, I can’t help him.
C. Unless he tells me about his family, I can help him.
D. Unless he tell me about his family, I can’t help him.