IT'S NOT EASY TO CHANGE PEOPLE'S ________ TOWARD A CERTAIN PROBLEM...

48. - KIEM TRA 1TIET SO 1 TRON 4 DE
KIEM TRA 1TIET SO 1 TRON 4 DE
48. It's not easy to change people's ________ toward a certain problem . A. idea B. thinking C. attitude D. opinion