In the 1920 what did businesses and industries do that coursed the economy to slow down

First off, Industries overproduced goods, and even though consumers bought some, tons of unused stock was lying around. Businesses also allowed Credit, which at the time, was excellent to make a booming economy nearly overnight, however, people bought beyond their means. So people purchased goods they couldn't truly afford, and when they stopped being able to make the payments, it was either take back the goods purchased but not fully paid for, or not take the full payment. these issues slowed the economy down.

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.

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.