In the United States v. Knight Company, the Supreme Court diminished the effectiveness of the ...

In the United States v. Knight Company, the Supreme Court diminished the effectiveness of the Sherman Anti-Trust Act by ruling that
 
  A) manufacturing was not interstate commerce.
  B) the Granger Laws were unconstitutional because states could not regulate interstate commerce.
  C) all trusts and monopolies in interstate commerce were illegal and could be broken up by the federal government.
  D) employers could force employees to sign and abide by yellow dog contracts.
  E) holding companies, which simply owned a controlling share of the stock of other firms, were not subject to antitrust laws.