What follows is an opinion from the Supreme Court of the United States. Your task is to determine the bases on which the Supreme Court rested its decision with regard to the legal provision that the Court considered in the case. Consider "judicial review (national level)" if the majority determined the constitutionality of some action taken by some unit or official of the federal government, including an interstate compact. Consider "judicial review (state level)" if the majority determined the constitutionality of some action taken by some unit or official of a state or local government. Consider "statutory construction" for cases where the majority interpret a federal statute, treaty, or court rule; if the Court interprets a federal statute governing the powers or jurisdiction of a federal court; if the Court construes a state law as incompatible with a federal law; or if an administrative official interprets a federal statute. Do not consider "statutory construction" where an administrative agency or official acts "pursuant to" a statute, unless the Court interprets the statute to determine if administrative action is proper. Consider "interpretation of administrative regulation or rule, or executive order" if the majority treats federal administrative action in arriving at its decision.Consider "diversity jurisdiction" if the majority said in approximately so many words that under its diversity jurisdiction it is interpreting state law. Consider "federal common law" if the majority indicate that it used a judge-made "doctrine" or "rule; if the Court without more merely specifies the disposition the Court has made of the case and cites one or more of its own previously decided cases unless the citation is qualified by the word "see."; if the case concerns admiralty or maritime law, or some other aspect of the law of nations other than a treaty; if the case concerns the retroactive application of a constitutional provision or a previous decision of the Court; if the case concerns an exclusionary rule, the harmless error rule (though not the statute), the abstention doctrine, comity, res judicata, or collateral estoppel; or if the case concerns a "rule" or "doctrine" that is not specified as related to or connected with a constitutional or statutory provision. Consider "Supreme Court supervision of lower federal or state courts or original jurisdiction" otherwise (i.e., the residual code); for issues pertaining to non-statutorily based Judicial Power topics; for cases arising under the Court's original jurisdiction; in cases in which the Court denied or dismissed the petition for review or where the decision of a lower court is affirmed by a tie vote; or in workers' compensation litigation involving statutory interpretation and, in addition, a discussion of jury determination and/or the sufficiency of the evidence.

Opinion:
KENTUCKY v. INDIANA et al.
No. 81,
Orig.
Decree entered November 4, 1985
DECREE
It Is Ordered, Adjudged, and Decreed that:
1. The boundary line between the State of Indiana and the Commonwealth of Kentucky is fixed as geodetically described in Joint Exhibit 50 to the Special Master’s Report filed with this Court on November 4, 1985. Joint Exhibit 50 is incorporated by reference herein.
2. Copies of this Decree and the Special Master’s Report (including Joint Exhibits 1-50, inclusive) shall be filed with the Clerk of this Court, the Archives Division of the Indiana Commission on Public Records of Indiana, and the Secretary of State of the Commonwealth of Kentucky.
3. Copies of this Decree and the Special Master’s Report (including Joint Exhibit 50 and paper prints of Joint Exhibits 1-49, inclusive, once they become available) shall be filed with the Office of the County Recorder in each of the following Indiana counties: the counties of Posey, Vanderburgh, Warrick, Spencer, Perry, Crawford, Harrison, Floyd, Clark, Jefferson, Switzerland, Ohio, and Dearborn; and with the County Clerk’s Office in the Commonwealth of Kentucky in each of the following Kentucky counties: the counties of Union, Henderson, Daviess, Hancock, Breckinridge, Meade, Hardin, Jefferson, Oldham, Trimble, Carroll, Gallatin, and Boone.
4. The State of Indiana and the Commonwealth of Kentucky each have concurrent jurisdiction over the Ohio River.
5. The costs of this proceeding shall be divided between the parties as recommended by the Special Master.

Question: What is the basis of the Supreme Court's decision?

Choices:
judicial review (national level)
judicial review (state level)
Supreme Court supervision of lower federal or state courts or original jurisdiction
statutory construction
interpretation of administrative regulation or rule, or executive order
diversity jurisdiction
federal common law

Answer: 2