What follows is an opinion from a United States Court of Appeals. Your task is to identify the federal agency (if any) whose decision was reviewed by the court of appeals. If there was no prior agency action, choose "not applicable".

Opinion:
NATIONAL LABOR RELATIONS BOARD v. ELIZABETH ARDEN, Inc.
No. 146.
Circuit Court of Appeals, Second Circuit.
Dec. 20, 1943.
Robert B. Watts, Gen. Counsel, Howard Lichtenstein, Asst. Gen. Counsel, and Ida Klaus, and Sidney L. Davis, all of Washington, D. C., and Martin I. Rose, of New York City, for petitioner.
Townley, Updike & Carter, of New York City (J. Howard Carter, of New York City, Joseph B. Duggan, of Poughkeepsie, and Weymouth D. Symmes, of New York City, of counsel), for respondent.
Before SWAN, AUGUSTUS N. HAND, and CLARK, Circuit Judges.
PER CURIAM.
Petition by National Labor Relations Board for enforcement of its order directing the respondent to cease and desist from certain unfair labor practices and to take certain affirmative action. The only question before us is whether the evidence supports the Board’s finding that Arden did not disestablish the “Association”, which was admittedly a company dominated union, but continued it in existence under the name of the “Independent”. Without reciting the evidence, it will suffice to say that the Board’s finding is supportable. See National Labor Relations Board v. Standard Oil Co., 2 Cir., Nov. 1, 1943, 138 F.2d 885. Paragraph 2(c) of the order is modified by adding the following suffix: “but the employees are free to organize any union they choose, whether or not it is affiliated with a national union.” See Westinghouse Electric & Mfg. Co. v. National Labor Relations Board, 2 Cir., 112 F.2d 657, 661; National Labor Relations Board v. Standard Oil Co., supra. As thus modified the order is affirmed and enforcement granted.

Question: What federal agency's decision was reviewed by the court of appeals?

Choices:
Benefits Review Board
Civil Aeronautics Board
Civil Service Commission
Federal Communications Commission
Federal Energy Regulatory Commission
Federal Power Commission
Federal Maritime Commission
Federal Trade Commission
Interstate Commerce Commission
National Labor Relations Board
Atomic Energy Commission
Nuclear Regulatory Commission
Securities & Exchange Commission
Other federal agency
Not ascertained or not applicable

Answer: 9