In the case of Lochner v. New York (1905), the Supreme Court decided that A.) state governments had to abide by the regulatory guidelines established by the federal government. B.) the federal government's authority over interstate commerce included the power to regulate intrastate manufacturing. C.) the Fourteenth Amendment was intended to protect the rights of African Americans from disenfranchisement and discrimination, and it had no bearing on workplace relations. Laws limiting the number of hours that employees could work in hazardous situations unconstitutionally deprived those employees of the opportunity to enter freely into contracts. D.) the Fourteenth Amendment's guarantee of equal protection under the law required state governments to regulate the workplace to maintain safe conditions for laborers.