I think it’s d but I’m not quite sure
If you're asking in general then, the area has to have people who share common customs, belief and language.However, this might not entirely be true as there are some countries which have vast diversity and still portray nationalism.
Hope this helps!!
D. The end of the cold war
It was primarily that FDR thought such a willingness to help the cause of minorities during the 1930s would "turn off" members of Congress, whom he needed to help pass his New Deal legislation.
