Task: songer_source

What follows is an opinion from a United States Court of Appeals. Your task is to identify the forum that heard this case immediately before the case came to the court of appeals.

PER CURIAM.
In our prior opinion in this case, 2 Cir., 207 F.2d 931, we affirmed the order of the district court dismissing the action herein. We did so first on the ground that the action was a collateral attack and as such was prohibited by the injunction accompanying the consolidation decree. Moreover, we found that the claims presented were not new but a een passe on e ore or were known at the time of previous attacks on the decree. See, In re Long Island Lighting Co 2 Cir. 197 F.2d 709. Thus the plaintiffs should have been barred from proceeding further on the basis of the allegations presented in the complaint. However, Judge Inch’s order dismissing the action contained the following clause: without prejudice to any further proceedings which the plaintiffs herein may desire to undertake, pursuant to this Court’s reserved jurisdiction in said Civil Action No. 10,413, to vacate or modify the order in the aforesaid action by reason of the aliegations set forth m the complaint here-m.”' In view of our further finding of resjudicata this clause should have been stricken out Accordingly, we modify our former decision by striking out the above clause, and as modified we affirm the order dismissing the action below.
Judgment modified and as modified affirmed; mandate recalled and amended accordingly.

Question: What forum heard this case immediately before the case came to the court of appeals?
A. Federal district court (single judge)
B. 3 judge district court
C. State court
D. Bankruptcy court, referee in bankruptcy, special master
E. Federal magistrate
F. Federal administrative agency
G. Court of Customs & Patent Appeals
H. Court of Claims
I. Court of Military Appeals
J. Tax Court or Tax Board
K. Administrative law judge
L. U.S. Supreme Court (remand)
M. Special DC court (not the US District Court for DC)
N. Earlier appeals court panel
O. Other
P. Not ascertained
Answer:

Answer: P