As it is mentioned in Article III, Sections 1 and 2 in the Constitution, in controversies between two or more states, citizens of diferent state, or claiming lands under grants of different state, the judicial power shall extent to, which, shall be invested in one Supreme Court and inferior courts, which is in few words the same concept as letter D.
The government entity in charge of settling disputes between the states are the Central Courts. Article 3, Section 2 of the Constitution states: "<em>The judicial Power shall extend to all Cases, in Law and Equity, arising under this Constitution, the Laws of the United States, and Treaties made, or which shall be made, under their Authority; to all Cases affecting Ambassadors, other public Ministers and Consuls; to all Cases of admiralty and maritime Jurisdiction; to Controversies to which the United States shall be a Party; to </em><em>Controversies between two or more States</em><em>; between a State and Citizens of another State; between Citizens of different States; between Citizens of the same State claiming Lands under Grants of different States, and between a State, or the Citizens thereof, and foreign States, Citizens or Subjects.</em>"
