Red Scare was the name given to the widespread fear of suspected Communists and radicals in the United States after World War I. The correct option among all the options given in the question is option "A". The first Red Scare happened in the United States during the 20th century and the reason was hyper nationalism in respect to World War I.
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B) only changes his or her opinion on a policy issue when a major event happens
Answer:
Douglass said that slaves owed nothing to and had no positive feelings towards the founding of the United States: ... What, to the American slave, is your 4th of July? I answer; a day that reveals to him, more than all other days in the year, the gross injustice and cruelty to which he is the constant victim
Genghis khan unified the mongolian tribes during this time period