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:
DAVIS v. BALTIMORE & OHIO RAILROAD CO.
No. 560.
Decided January 25, 1965.
B. Nathaniel Richter, Charles A. Lord and Amos /. Meyers for petitioner.
Fenton L. Martin for respondent
Per Curiam.
The petition for writ of certiorari is granted. The judgment of the Maryland Court of Appeals is reversed.
In this action under the Federal Employers’ Liability Act, 45 U. S. C. § 51 et seq., the petitioner was awarded damages by a jury in the Superior Court of Baltimore City. The Court of Appeals held that the issue of employer negligence should not have been submitted to the jury and that the trial court erred in denying the motions of the railroad for a directed verdict and for a judgment n. o. v., 235 Md. 568, 202 A. 2d 348.
The petitioner worked, for the railroad as a tallyman and trucker at its Locust Point terminal in Baltimore City. His foreman directed him to find some boxes of merchandise. While working on this assignment near an open elevator shaft he fell into the shaft and one of the railroad’s forklift trucks fell in on top of him. The crucial fact question in the case concerned the forklift truck. There was testimony that the petitioner had mounted the truck and backed it into the shaft. There was also evidence, however, which, if believed by the jury, would support a finding that the operator assigned to use the truck .negligently left it unattended, and that it rolled toward the petitioner, either because it was not secured or because it was set in motion by an unauthorized third person, and struck petitioner in the back, propelling him into the shaft. In these circumstances, the Court of Appeals improperly invaded the function and province of the jury. Rogers v. Missouri Pac. R. Co., 352 U. S. 500; Gallick v. Baltimore & Ohio R. Co., 372 U. S. 108.

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: 3