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.    

He is very stubborn but flattery usually WORKS LIKE A CHARM on him.

• A. A. takes effects
• B. B. has no effect on
• C. C. is completely successful in
• D. D. turn out to be a disaster for

work like a charm = rất thành công, rất hiệu quả
=> B