Which of the Following Is a Reason That Little Progress

Multiple Choice

Which of the following is a reason that little progress has been made toward the ambitious goals set at the 1992 Earth Summit in Rio de Janeiro?

A) China has shown a strong appetite to adopt tighter pollution controls.
B) Political cooperation in the U.S. Congress promotes domestic action.
C) There is a culture of denial in the United States.
D) Trade liberalization efforts have not been rolled back.