Well, in the first World War, Germany lost the war because of the Jewish. Another reason would be that Hitler used myths and lies, and used anti-semitism to his advantage, with myths like how the Jews killed Jesus Christ(when it was actually the Romans) So because of religious prejudice and a long history of anti-semitism made them prime targets.
Black identity and cultures
“The following statement about the disenfranchisement of African Americans in the South which is true is that white voting officials administered difficult literacy tests to African American voters. Since African Americans were denied the same standard of education as American Whites, when offered literacy tests they often had trouble completing them. The voting officials were aware of this, but did it anyways, as it was another way for them to hinder African Americans from voting and from entering the larger society.”
B - Some communities closed their schools rather than to integrate.
While some in the the south did not want to integrate their schools, some communities refused (but not most) and they figured out plans to delay integration, transfer students to different schools and close others.
B, because when Japan attacked China, China unified to fight a common enemy.