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:
PUBLIC SERVICE COMMISSION OF MARYLAND v. CHESAPEAKE & POTOMAC TELEPHONE COMPANY OF MARYLAND
No. 84-1362.
Argued January 13, 1986
Decided May 27, 1986
Kirk J. Emge argued the cause and filed briefs for petitioner.
Jack D. Smith argued the cause for the Federal Communications Commission as amicus curiae urging reversal. With him on the brief were Acting Solicitor General Fried, Deputy Solicitor General Wallace, Christopher J. Wright, Daniel M. Armstrong, and Jane E. Mago.
D. Michael Stroud argued the cause for respondent. With him on the brief were J. William Sarver, Mark J. Mathis, and Daniel I. Prywes.
A brief of amici curiae urging reversal was filed for the State of California et al. by Janice E. Kerr, J. Calvin Simpson, Mark E. Fogelman, Ellen S. LeVine, Joseph I. Lieberman, Attorney General of Connecticut, William B. Gundling, Peter J. Jenkelunas, and Phyllis E. Lemell, Assistant Attorneys General, Howard C. Davenport, Wiliam S. Bilenky, Philip Stoffregen, Patrick Nugent, William Paul Rodgers, Jr., Jack Shreve, Stephen L. Skipper, Robert Waldrum, Joseph G. Donahue, William E. Furber, John K. Keane, Jr., Frank J. Kelley, Attorney General of Michigan, Louis J. Caruso, Solicitor General, Don L. Keskey and Leo H. Friedman, Assistant Attorneys General, Lynda S. Mounts, Brian Moline, Ellyn Elise Crutcher, Michael R. Fontham, and Marshall B. Brinkley.
A brief of amici curiae urging affirmance was filed for American Telephone and Telegraph Co. et al. by Michael Boudin, Thomas J. Reiman, Vincent L. Sgrosso, W. Preston Granbery, and John B. Messenger.
Per Curiam.
We vacate the judgment of the Court of Appeals for the Fourth Circuit and remand for further proceedings consistent with the opinion in Louisiana Public Service Comm’n v. FCC, ante, p. 355.
It is so ordered.
Justice Powell and Justice O’Connor took no part in the consideration or decision of this case.

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: 4