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:
RALSTON PURINA CO. et al. v. LOUISVILLE & NASHVILLE RAILROAD CO. et al.
No. 75-1015.
Decided June 14, 1976
Per Curiam.
This is an appeal from the judgment of a three-judge District Court setting aside and annulling a decision and order of the Interstate Commerce Commission. Louisville & Nashville R. Co. v. United States, 397 F. Supp. 607 (WD Ky. 1975).
In 1973, the railroads in southern territory, which lies south of the Ohio River and east of the Mississippi, proposed new tariffs changing the method of calculating the through rates on vegetable oil, cake or meal, and related articles, which were subject to transit privileges at various points where animal, fish, and poultry feed using these ingredients was made and transshipped. Certain large feed manufacturers protested. The Commission found that the net effect of the new tariffs would be to increase the through rates on the articles involved and that the railroads had “not presented probative evidence in justification” of the new tariffs. Based on the testimony and evidence presented by the protestante the Commission found “strong support on this record for concluding that these shippers will divert a considerable portion of their feed traffic, from railroad to trucks, with the establishment of the proposed rule.” The result, the Commission found, would be “a net loss of revenue to the [railroads] despite the assessment of the higher rates and charges and thus will be self-defeating.” The Commission concluded that the railroads had not met their burden of proof that the proposed tariffs were just and reasonable under § 15 of the Interstate Commerce Act, 24 Stat. 384, as amended, 49 U. S. C. §15(7), and required that the railroads cancel the schedule. 346 I. C. C. 579, 587-588 (1973).
The District Court set aside and annulled the Commission order for want of substantial evidence to support it. The District Court considered the shippers’ evidence mere conjecture and self-serving and could not accept the Commission’s conclusion that the railroads would lose revenue from the new tariffs. It also thought it “un-controverted” that “the railroads have incurred a loss of revenue from the transportation of meal,” and therefore “clearly established that if there should be a diversion of meal traffic as predicted by the shippers, the carriers would actually be in a better financial position than at present.” 397 F. Supp., at 610.
We reverse the judgment of the District Court. Con-cededly, there was detailed evidence with respect to the anticipated traffic diversion which the Commission credited and thought strongly supported its conclusion. The District Court exceeded its function in reweighing the testimony, which is primarily the task of the Commission. Alton R. Co. v. United States, 315 U. S. 15, 23-24 (1942); Illinois C. R. Co. v. Norfolk & W. R. Co., 385 U. S. 57, 69 (1966). On the record before it, the District Court also erred in differing with the Commission and agreeing with the railroads with respect to the impact of the new tariffs on railroad revenue. The court relied on evidence which showed only that under the old rates the railroads sustained a loss on feed outbound from the transit points and which, as a railroad witness testified, Comm’n Tr. 28-29, did not relate to the net gain or loss on inbound meal shipments or on the through movement when both legs were considered together.
Reversed.
Mr. Justice Powell took no part in the consideration or decision of this case.

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: 4
2