One of the key goals of the supreme court, headed by chief justice earl warren in the 1960s, was to a). reduce federal authority over state and local government b). encourage free enterprise by reducing the scope of government regulation of business c). require the states to abide by the provisions of the bill of rights regarding procedures in criminal cases d). increase presidential power in foreign affairs

The correct answer should be C). Require the states to abide by the provisions of the Bill of Rights regarding procedures in criminal cases

This is because the Warren court was known for the way that they managed to implement the fourteenth amendment in their fight for civil rights. They weren't the ones who reduced federal power but rather increased it and heights that weren't there before. They also participated in numerous cases that involved the bill of rights and the constitution.