Answer: driving on the highway
It is the practice of driving in the highway that can be considered as an indicator of finally accepting social contract. Social contract refers to the agreement wherein individuals in all parties agreed to have a natural transfer of right.
Mao Zedong launched the Cultural Revolution in China in response to what he and other Chines viewed as social encroachments from the west that were threatening the Chinese way of life.
What you basically need to know is that the contras were right-wing and that they opposed the left-wing government.
The left-wing governments were generally not seen as desired during the cold war because they could strengthen the communists, which were competing with the US.
So the US hoped that the contras would weaken or even replace the left-wing government.
I believe it is D) It suffered a weakening economy, domestic revolts, and a loss to the Allies in World War I.