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. PLANTERS MFG. CO., Inc.
No. 4463.
Circuit Court of Appeals, Fourth Circuit.
Aug. 29, 1939.
For prior opinion, see 105 F.2d 750.
Ruth Weyand, Atty., National Labor Relations Board, of Washington, D. C. (Charles Fahy, Gen. Counsel, Robert B. Watts, Associate Gen. Counsel, and Mortimer B. Wolf, Bertram Edises, and Ramey Donovan, Attys. National Labor Relations Board, all of Washington, D. C., on the brief), for petitioner.
Gerould M. Rumble, of Norfolk, Va. (Rumble & Rumble, of Norfolk, Va., on the brief), for respondent.
_ Before PARKER and NORTHCOTT, Circuit Judges, and WYCHE, District Judge.
PER CURIAM.
The petition for rehearing filed herein presents no point not already fully considered; and we see no reason to change the decree enforcing the order of the Board. With respect to the reinstatement of the thirteen employees, however, it may be well to make clear that such reinstatement does not mean that they must .be furnished employment at a period when due to the seasonal nature of the respondent’s business no employment is available, but merely that they be restored to their former position and given work when other like employees are given work. Likewise, the order with respect to back pay does not mean that the employees are to be paid wages for the entire period that has elapsed since their discharge, but merely that they shall be paid what they would have earned during that period if they had not been discharged, taking into account the seasonal character of the employer’s business. This we understand to be the intent and meaning of the Board’s order. Should attempt be made, as respondent fears, to apply the order otherwise, the action of the Board will be subject to review upon petition properly filed with this Court.
Petition denied.

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