The Principle That the Supreme Court Used in Overturning Fulton's

 The principle that the Supreme Court used in overturning Fulton's monopoly on a New York steamboat operation was that 

A)  a monopoly is a restraint on trade. 
B)  patents cannot be issued on recent technology. 
C)  state law cannot prevail over federal law. 
D)  interstate commerce cannot be regulated. 
E)  the indirect effects of commerce are beyond the scope of government regulation.