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.
Dominguez was notified that the court was considering summary affirmance and afforded an opportunity to oppose such disposition by filing a memorandum addressing the merits of the cause. He has submitted a brief, filed-at the time of docketing, and a supplemental pleading since then. Examination of the file and records in this case prompts the conclusion that the questions presented are so unsubstantial as not to warrant further argument.
Accordingly, the judgment of the district court is affirmed for the reasons stated in its Memorandum and Order, 317 F.Supp. 10 (D.Kan.1970). See also Dearman v. Woodson, 429 F.2d 1288 (10th Cir., 1970).

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