D. The idea of separate but equal came about in plessy vs ferguson in the 1870s and brown vs board of education sought to discontinue the old practice of segregation in this instance in public schools.
They were able to vote in the 1960's.
Basically, a citizen of the United States is any person who is in possession of the citizenship, which can be acquired by being born on the territory of the US or by being naturalized. The citizens, unlike other legal residents, can choose their representatives in elections.
the Committee of Public Safety thought monopolies was such a great crime because of the fact that it took so many homes off sale in so other people couldn't buy houses that they wanted.