Why Were Attempts by Congress to Regulate Child Labor and Factory

Multiple Choice

Why were attempts by Congress to regulate child labor and factory conditions in local workplaces struck down by the Supreme Court as unconstitutional in the late nineteenth century?

A) Regulating local workplaces was seen to be inconsistent with the full faith and privileges clause of the Constitution.
B) Regulating local workplaces was seen to violate the Twenty-seventh Amendment to the Constitution.
C) Regulating local workplaces was seen to violate the comity clause of the Constitution.
D) Regulating local workplaces was beyond the scope of the understanding of interstate commerce at the time and was,therefore,seen to be an unconstitutional exercise of police power by the federal government.
E) Regulating local workplaces was seen to violate the strongly held value of regulated federalism.