In 1954, the Supreme Court case Brown v. Board of Education overturned Plessy v. Ferguson by ruling segregation unconstitutional.
stated that African American and white schools needed to be equal.
upheld the Separate Car Act by ruling that segregation was legal.
upheld Plessy v. Ferguson by ruling segregation constitutional.

On May 17, 1954, U.S. Supreme Court Justice Earl Warren delivered the unanimous ruling in the landmark civil rights case Brown v. Board of Education of Topeka, Kansas. State-sanctioned segregation of public schools was a violation of the 14th amendment and was therefore unconstitutional.

Explanation:

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.