Which court would have original jurisdiction over a case in which one state sued another?

state supreme court
u. s. supreme court
u. s. court of appeals
u. s. district court

It depends what the situation is, but I think that for the most part it is C the U.S. Court of Appeals. U.S. Court of Appeals has districts that group certain states together, for instance, Alabama is grouped with Georgia and Florida. So, I say it is C because I do not think Maine (district 1) would be too concerned over what Georgia (district 11) does. But if for some reason that does happen, I suppose it would go to the U.S Supreme Court.