Answer:
d. Pro communist protests at Tiananmen Square
Explanation:
Among the options, event D was the least shocking for the end of the cold war as the Chinese government had distanced itself from the Soviet Union. In this social march, Chinese students sued for greater political openness and economic reforms. But the result was tragic, as between 300 and 3,000 people were repressed and killed under fire from army tanks that joined together to vacate Tiananmen Square.