I’ll let you borrow the book but you must promise...

Câu hỏi: I’ll let you borrow the book but you must promise to return it next week.

A. If you promise to return the book, I let you borrow it.

B. If you promise to return the book next week, I’ll let you borrow it.

C. If you promise to return the book next week, I won’t let you borrow it.

D. If you promised to return the book, I’ll let you borrow it.