Option D. The Supreme Court case of Munn v. Illinois showed that: Granger laws were unconstitutional..
This was the term that was used to refer to the laws that were made by the states in America that concerned the operation of the railroad rates and also the storage or the elevation of grains.
In the case the supreme court ruled that for all products that served by the interests of the United States citizens, the states would not have to be the regulators but the federal government.
Read more on Munn v. Illinois here: https://brainly.com/question/24416598
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