Mai and Nam  are talking about the cell phone that...

Câu hỏi: Mai and Nam  are talking about the cell phone that Nam has just bought.~Mai: “Wow, I’ve never seen such a nice cell phone, Nam”     ~Nam: “          ”.

A Oh, I don’t know.      

B Thank you. I’m glad you like it.

C You’re welcome.     

D I agree with you.