Congress passes a law prohibiting cigars made in Cuba from being sold in the United States. The Florida state legislature then passes a law allowing the sale of Cuban cigars in Florida. If the constitutionality of the Florida law is challenged in court, it will most likely be: a. upheld unless Congress expressly prohibits states from enacting laws regarding cigars. b. upheld on the basis of the supremacy clause. c. struck down on the basis of the due process clause. d. struck down on the basis of the supremacy clause.