This presentation is optional for the students to do. A. The students mustn’t do this presentation. B. The students shouldn’t do this presentation. C. The students don’t have to do this prĐoạn văn47/50This presentation is optional for the students to do.The students mustn’t do this presentation.The students shouldn’t do this presentation.The students don’t have to do this presentation. The students mightn’t do this presentation.Giải thíchChọn C