The implied agreement between the people and the government in which the people give up some of their power and freedom in exchange for protection of their rights

The correct answer b) social contract.

the other answers are wrong, for example: the divine right of king would mean that the king has a right to rule and does need an agreement from the people and natural rights are rights that all people have but the agreement, is not a right, but an agreement, or in other words: contract.

labor leaders and organizations had the power to demand it.

explanation:

workers got a five-day workweek because the bcea protects and respect the rights of the employees. labor leaders and other groups demanded it.

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.