Several States,such as Colorado and Washington,have Legalized Marijuana for Recreational

Several states,such as Colorado and Washington,have legalized marijuana for recreational purposes.In effect,these states have done which of the following?

A) Ignored a limited area of national law
B) Recognized that only states have the legal right to regulate controlled substances
C) Followed a Supreme Court decision that said the federal government may not make laws that contradict state laws
D) Recognized that the Supreme Court has limited state sovereignty with regard to the use of marijuana
E) Conceded that only the federal government has the legal right to regulate controlled substances