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.
A careful examination of the entire record before the court without regard to “technical errors, defects, or exceptions which do not affect the substantial rights of the parties”, as required by Section 391, 28 U.S.C.A., makes it dear that the proceedings in the court below were conducted in strict accordance with Rule 61, Federal Rules, Civil Procedure, 28 U.S.C.A. following section 723c, which requires “the court at every stage of the proceeding must disregard any error or defect * * * which does not affect the substantial rights of the parties”, and that the judgment must be affirmed.
Affirmed.

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: A