The correct option is A
<span>A. the Tienanmen Square protests
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<span> Tienanmen Square incident, also called June Fourth incident or 6/4, series of protests and demonstrations in China in the spring of 1989 whereby over 10000 students were killed during the protests by the communist regime using the Chinese army. </span>
The Middle Ages in<span> Europe saw a decrease </span>in<span> prosperity, stability, and population </span>in the first<span> centuries of the </span>period—to about 800 AD, and then a fairly steady and general increase until the massive setback of the Black Death around 1350, which is estimated to have killed at least a third of the overall populationin<span> Europe, ...</span>
Fear or hostility toward other cultures: negative
gaining an understanding of foreign customs and beliefs: positive
fear about loss of a national cultural identity: negative
choice of different types of food: positive
Swann v. Charlotte-Mecklenburg Board of Education, case in which, on April 20, 1971, the Supreme Court of the United States unanimously upheld busing programs that aimed to speed up the racial integration of public schools in the United States. ... Indeed, busing was used by white officials to maintain segregation.
Source: https://www.britannica.com/event/Swann-v-Charlotte-Mecklenburg-Board-of-Education
