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:
PETROWSKI et al. v. HAWKEYE-SECURITY INSURANCE CO.
No. 469.
Argued March 7, 1956.
Decided March 26, 1956.
jRichard P. Tinkham, Jr. argued the cause and filed a brief for petitioners.
Victor M. Harding argued the cause for respondent. With him on the brief was Herbert C. Hirschboeck.
Per Curiam.
Respondent, Hawkeye-Security Insurance Company, filed a motion to quash the return of service of summons on the grounds that the District Court acquired no personal jurisdiction over it and that the power of attorney which it had filed with the Commissioner of Motor Vehicles of the State of Wisconsin did not authorize him to accept service of process for it in this case. After this motion was denied, respondent filed its answer to the complaint in which it again pressed its claim that the District Court lacked personal jurisdiction over it. Subsequently, however, respondent filed (1) a motion to amend its answer and to interplead; (2) a counterclaim; (3) a stipulation and order adding a party-plaintiff and amending the complaint and answer; and (4) a stipulation that judgment be entered against the alleged insured in favor of the additional party-plaintiff. The latter stipulation included the following provision, together with others consistent with it and confirmatory of its purpose:
“1. That each of the parties to this stipulation voluntarily submits to the jurisdiction of the above entitled Court without service of process herein, the same as if personal service had been obtained by each against the other.”
Following a trial on the merits, judgment was entered against respondent, but the Court of Appeals, with one judge dissenting, reversed on the ground that respondent’s motion to quash should have been granted. 226 F. 2d 126.
Upon examination of the record and the law, we conclude that the District Court had jurisdiction of the subject matter and that respondent, by its stipulation, waived any right to assert a lack of personal jurisdiction over it. We, therefore, reverse the judgment of the Court of Appeals and remand the case to it for further proceedings.
Reversed and remanded.

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