Leah, a Citizen of Maine, Obtains a Federal License to Operate

Leah, a citizen of Maine, obtains a federal license to operate a commercial fishing boat in a certain area off the Maine coast. The Maine state legislature enacts a law that bans all commercial fishing in that area. Most likely, the state law violates

A) no provision in the U.S. Constitution.
B) the equal protection clause.
C) the due process clause.
D) the supremacy clause.