Two Neighbors Have a Dispute About the Placement of Their

Two neighbors have a dispute about the placement of their mailboxes. Which federal institution is designed to handle such a conflict?

A) Congress, because it handles issues of interstate commerce
B) the Supreme Court, because citizens have the right to have their cases heard in the highest court
C) the Supreme Court, because it is designed to settle disputes about interstate commerce
D) none, because conflicts between citizens of the same state should be handled by state governors
E) none, because states have maintained their own court systems for disputes between state residents