Respuesta :
Answer:
D. the fact that states were allowed to experiment with different approaches to government
Explanation:
Justice Louis Brandeis called the states “laboratories of democracy” in the case "New State Ice Co v. Liebmann" and defended that the states of the US were able to serve as a laboratory and try different social and economical experiences without putting the whole country in risk. This happens because the Federalist system gives the States certain autonomy, for example, the legalization of marijuana.