2. In Heart of Atlanta Motel v. United States (1964), the Co…

2. In Heart of Atlanta Motel v. United States (1964), the Court upheld the Civil Rights Act of 1964, which prohibits racial discrimination in places of public accommodation. Under which provision of the Constitution did the Court uphold the Civil Rights Act?  Which alterative provision did the justices consider?  Why did the majority rely on the one provision over the other?