Which supreme court ruling caused schools to start integrating in the 1950s a plessy v ferguson b brown v board of education c deed scott v sandford d gideon v wainwright

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

the answer is mass marketing.