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:
De MEERLEER v. MICHIGAN.
No. 140.
Argued January 6, 1947.
Decided February 3, 1947.
David W. Louisell argued the cause and filed a brief for petitioner.
Edmund E. Shepherd, Solicitor General of Michigan, argued the cause for respondent. With him on the brief were Eugene F. Black, Attorney General, and Daniel J. O’Hara, Assistant Attorney General.
Per Curiam.
In conformity with Michigan procedure, petitioner moved for leave to file a delayed motion for new trial in the court in which he had been convicted of first-degree murder. Serious impairment of his constitutional rights at the arraignment and trial were asserted as grounds for the motion. The trial court denied the motion, and the Supreme Court of Michigan on appeal affirmed that ruling. 313 Mich. 548, 21 N. W. 2d 849. We granted certi-orari because of the importance of the constitutional issues presented.
The facts are not in dispute. On May 16, 1932, an information was filed in the Circuit Court of Lenawee County, Michigan, charging petitioner, then seventeen years of age, and one Virgil Scott with the crime of murder. On the same day, petitioner was arraigned, tried, convicted of first-degree murder and sentenced to life imprisonment. The record indicates that petitioner was without legal assistance throughout all these proceedings and was never advised of his right to counsel. The court did not explain the consequences of the plea of guilty, and the record indicates considerable confusion in petitioner’s mind at the time of the arraignment as to the effect of such a plea. No evidence in petitioner’s behalf was introduced at the trial and none of the State’s witnesses were subjected to cross-examination.
After reviewing the foregoing facts, the Supreme Court of Michigan determined that the record revealed no deprivation of petitioner’s constitutional rights. The court indicated that it had given consideration to the case of Hawk v. Olson, 326 U. S. 271 (1945), and the authorities cited therein, but concluded that the rule of the Michigan cases was determinative. See People v. Williams, 225 Mich. 133, 195 N. W. 818 (1923). In this there was error.
Here a seventeen-year-old defendant, confronted by a serious and complicated criminal charge, was hurried through unfamiliar legal proceedings without a word being said in his defense. At no time was assistance of counsel offered or mentioned to him, nor was he apprised of the consequences of his plea. Under the holdings of this Court, petitioner was deprived of rights essential to a fair hearing under the Federal Constitution. Powell v. Alabama, 287 U. S. 45 (1932); Williams v. Kaiser, 323 U. S. 471 (1945); Tomkins v. Missouri, 323 U. S. 485 (1945); White v. Ragen, 324 U. S. 760 (1945); Hawk v. Olson, supra. See Betts v. Brady, 316 U. S. 455 (1942).
Reversed.

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: 1