What follows is an opinion from the Supreme Court of the United States. Your task is to identify the type of decision made by the court among the following: Consider "opinion of the court (orally argued)" if the court decided the case by a signed opinion and the case was orally argued. For the 1791-1945 terms, the case need not be orally argued, but a justice must be listed as delivering the opinion of the Court. Consider "per curiam (no oral argument)" if the court decided the case with an opinion but without hearing oral arguments. For the 1791-1945 terms, the Court (or reporter) need not use the term "per curiam" but rather "The Court [said],""By the Court," or "By direction of the Court." Consider "decrees" in the infrequent type of decisions where the justices will typically appoint a special master to take testimony and render a report, the bulk of which generally becomes the Court's decision. This type of decision usually arises under the Court's original jurisdiction and involves state boundary disputes. Consider "equally divided vote" for cases decided by an equally divided vote, for example when a justice fails to participate in a case or when the Court has a vacancy. Consider "per curiam (orally argued)" if no individual justice's name appears as author of the Court's opinion and the case was orally argued. Consider "judgment of the Court (orally argued)" for formally decided cases (decided the case by a signed opinion) where less than a majority of the participating justices agree with the opinion produced by the justice assigned to write the Court's opinion.

Opinion:
ARKANSAS v. TENNESSEE
No. 33,
Orig.
Decided February 25, 1970
Decree entered February 25, 1970
Opinion reported: Ante, p. 88.
DECREE
1. It is ordered, adjudged, and decreed that the boundary line between the States of Arkansas and Tennessee in the area in controversy shall be fixed in the middle of the old abandoned Cow Island Bendway Channel as partially reflected in the 1953 survey of one R. L. Cooper (Defendant’s Exhibit 42, attached to the decree in Brown v. Brakensiek, in the Chancery Court of Shelby County, Tennessee), said abandoned channel extending from its upper or up-river end to the lower or down-river end of Ike Chute as far as that survey goes, thence downstream in a southerly direction passing down the middle of a water drain or creek now running between the lower end of Ike Chute and the upper end of 96 Chute, thence continuing downstream in a southerly direction down the middle of 96 Chute and coming out of 96 Chute on a continuing straight line to the point where it joins the present navigation channel of the Mississippi River, all as indicated by a broken line marked “State Line” on the annexed reduced copy of the 1965 aerial photograph of the area in controversy, Joint Exhibit A, marked Appendix A-I, and also as reflected by a broken line marked “State Line” on a reduced copy of Defendant’s Exhibit 39, the 1937 map of the United States Engineers and hereto annexed as Appendix A-II.
2. It is ordered that the Hon. Gunnar H. Nordbye be, and he is hereby, appointed Commissioner in this case with power to engage and supervise a competent surveyor, or surveyors, to survey the boundary line as provided in this decree. The boundary line determined by such survey shall be submitted to the Court by the Commissioner and, if approved, shall be the boundary line between the two States.
3. The costs of this proceeding shall be divided equally between the parties.
[Appendixes A-I and A-II follow this page.]

Question: What type of decision did the court make?

Choices:
opinion of the court (orally argued)
per curiam (no oral argument)
decrees
equally divided vote
per curiam (orally argued)
judgment of the Court (orally argued)
seriatim

Answer: 2