Viết lại các câu sau bằng những từ cho sẵn dưới đâyCâu hỏi I/ not/ know/ what/ do/ make/ mother/ happy/. A. I not know what do to make mother happy B. I don’t know what to doing make my mother happy. C. I don’t know what to do to make my mother happy. D. I don’t know what doing to make my mother happy.