What Was the Significance of the U

What was the significance of the U.S. v. E.C. Knight (1895) decision for the development of American federalism?

A) It expanded Congress' ability to regulate interstate commerce by including manufacturing and production as categories covered.
B) It limited Congress's ability to regulate interstate commerce by excluding manufacturing and production as categories covered.
C) It established the principle of "separate but equal" in regards to the national government's ability to intervene in state segregation issues.
D) It claimed that the executive could not impose command economic structures and procedures on the American national economy even in the face of a global political or economic crisis.