Tiếng Anh Lớp 10: 2. They say that Nam is the brightest student in class. A. They said that Nam is the brightest student in class. B. They said that Nam to be the brightest student in class. C. Nam is said to be the brightest student in class. D. It is said that Nam to be the brightest student in class., giúp em giải bài này ạ, em cảm ơn thầy cô và các bạn nhiều.