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:
OSCAR GRUSS & SON v. UNITED STATES et al.
No. 1060.
Decided May 8, 1967.
Myron S. Isaacs, for appellant.
Solicitor General Marshall, Assistant Attorney General Turner, Robert W. Ginnane and Jerome Nelson for the United States et al., Hugh B. Cox and Henry P. Sailer for the Pennsylvania Railroad Co. et al., and Joseph Auerbach for Smith et al., appellees.
Per Curiam.
Appellant is a bondholder of the New York, New Haven &.Hartford Railroad Company (the New Haven), which is now undergoing a reorganization under § 77 of the Bankruptcy Act, 11 U. S. C. § 205. On April 6, 1966, the Interstate Commerce Commission directed inclusion of the New Haven in the merger of the New York Central Railroad Company and the Pennsylvania Railroad Company as soon as terms and conditions could be settled, but approved the Penn-Central merger and authorized its consummation prior to such inclusion. Appellant then petitioned the Commission to reconsider this order. The Commission allowed appellant to intervene but denied the petition to reconsider, and appellant then challenged the Commission’s order of April 6 in the District Court, which dismissed the complaint on the ground, among others, that appellant lacked standing to attack the Penn-Central merger. Since that time this Court has reviewed other aspects of the Commission’s order approving the merger ¿nd has directed a remand to the Commission for further proceedings. Baltimore & Ohio R. Co. v. United States, ante, p. 372. Since the order which appellant’s suit attacked is now subject to further consideration by the Commission and since proceedings to achieve inclusion of the New.Haven are also under way before the Commission, it appears inappropriate to review the decision of the District Court at this time. Rather, we vacate the order of the. District Court and remand the case , to that court. Should appellant still be dissatisfied with the ultimate order of the Commission in the merger proceedings, it may attempt a fresh challenge in the District Court..
It is so ordered.

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