Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

They haven't reached agreement on the OFFICIAL songs of the 27th Sea Games.

• A. A. approved
• B. B. informal
• C. C. formal
• D. D. uncertified

approved = chấp thuận, phê duyệt
informal = thân mật, không trang trọng
formal = trang trọng
uncertified = không được xác thực, chứng nhận
=> A