Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
A. controversial (adj): gây tranh cãi
B. conflict (n): xung đột
C. preparation (n): sự chuẩn bị
D. agreement (n): sự đồng ý
→ a bone of contention (n): một vấn đề gây tranh cãi >< agreement