Task: songer_origin

What follows is an opinion from a United States Court of Appeals. Your task is to identify the type of court which made the original decision. Code cases removed from a state court as originating in federal district court. For "State court", include habeas corpus petitions after conviction in state court and petitions from courts of territories other than the U.S. District Courts. For "Special DC court", include courts other than the US District Court for DC. For "Other", include courts such as the Tax Court and a court martial.

OPINION
PER CURIAM:
This treble damage action under section 4 of the Clayton Act, 15 U.S.C. § 15, was directed against the three largest domestic automobile manufacturers. It was instituted by ten Chicago aider-men, individually and on behalf of that city’s residents under Rule 23. Their claim is bottomed on the same factual allegations presented in In re Multidistrict Vehicle Air Pollution, M.D.L. No. 31, 9 Cir., 481 F.2d 122, in which our opinion has this day issued. The District Court held that the action could not be maintained under Rule 23 and this interlocutory appeal, under 28 U.S.C. § 1292(b), followed.
We need not reach the class action issues since the disposition of this appeal is controlled by our resolution of the standing issue under section 4 of the Clayton Act in Multidistrict Vehicle Air Pollution, swpra. The appellants here alleged no injuries to commercial ventures or enterprises, and since they lack the requisite standing, the District Court will, upon remand, dismiss the action in its entirety.
Remanded with directions.

Question: What type of court made the original decision?
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. Special DC court
H. Other 
I. Not ascertained
Answer:

Answer: A