Segregation, Jim crow, and racism. But the main answer is segregation.
Because it's always only been about these 2 parties. Republican and democrat. The third parties are just there... they never ever get enough votes to win, electoral or popular vote.
What kind of events are you looking for and in what country??
The answer is B. "Estudiante" is not correct because it is the singular form for student, while the rest of the sentence is in plural. The correct form of the sentence is "Las estudiantes son inteligentes".
After World War II, the federal government took control of millions of acres of New Mexico land, which it used to build military bases, missile ranges, and R&D facilities. The laboratory at Los Alamos became part of a new network of National Laboratories around the country.