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:
DeMARCO v. UNITED STATES
No. 73-5684.
Decided March 18, 1974
Per Curiam.
At petitioner’s trial, a Government witness who had been indicted with petitioner, testified that the Government had made no promises to him with respect to the disposition of his case. Petitioner was convicted and he appealed. Meanwhile, the witness had pleaded guilty to a lesser charge contained in a superseding indictment; and at the witness’ sentencing hearing, the United States Attorney made certain statements that petitioner interpreted as proving that promises had been made to the witness prior to his testimony and that the witness had testified falsely at petitioner’s trial. Without presenting the matter to the District Court, petitioner pressed the question in the Court of Appeals. That court accepted the tendered issue, examined the transcript of the hearing at which the witness was sentenced, considered the Government’s response in the Court of Appeals and, although the prosecutor’s remarks were deemed ambiguous and the question thought to be a “close” one, concluded that no promises had been made to the witness prior to the witness’ testimony at petitioner’s trial.
Unquestionably, had there been a promise to the witness prior to his testimony, Giglio v. United States, 405 U. S. 150 (1972), and Napue v. Illinois, 360 U. S. 264 (1959), would require reversal of petitioner’s conviction. It is also clear that there was a plea bargain between the witness and the Government at some point, the question being whether it was made after or before petitioner’s trial. This factual issue was dispositive of the case, and it would have been better practice not to resolve it in the Court of Appeals based only on the materials then before the court. The issue should have been remanded for initial disposition in the District Court after an evi-dentiary hearing. We therefore grant the petition for certiorari and the motion to proceed in forma pauperis, vacate the judgment of the Court of Appeals, and remand the case to that court with instructions to remand the case to the District Court for further proceedings consistent with this opinion.
So ordered.
The Government’s response to the petition for certiorari agrees that factfinding is the basic responsibility of district courts, rather than appellate courts, and that the Court of Appeals should not have resolved in the first instance this factual dispute which had not been considered by the District Court. See, e. g., General Electric Credit Corp. v. Robbins, 414 F. 2d 208, 211 (CA8 1969); Yanish v. Barber, 232 F. 2d 939, 946-947 (CA9 1956). See also 5A J. Moore, Federal Practice ¶ 52.06 [2] n. 1 (2d ed. 1974).

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