Task: songer_casetyp1_7-2

What follows is an opinion from a United States Court of Appeals.
Your task is to identify the issue in the case, that is, the social and/or political context of the litigation in which more purely legal issues are argued. Put somewhat differently, this field identifies the nature of the conflict between the litigants. The focus here is on the subject matter of the controversy rather than its legal basis.
Your task is to determine the specific issue in the case within the broad category of "economic activity and regulation". 

PER CURIAM.
This is an appeal from a summary judgment which was entered against plaintiff-appellant in a private antitrust action seeking treble damages for an alleged violation of the Sherman Act. We have carefully reviewed the record and conclude that the trial court committed no error.
The judgment is affirmed, D.C., 35 F.R.D. 558.
. See Fed.R.Civ.P. 56(e); Dressier v. M. V. Sandpiper, 331 F.2d 130 (2 Cir. 1964).

Question: What is the specific issue in the case within the general category of "economic activity and regulation"?
A. taxes, patents, copyright
B. torts
C. commercial disputes
D. bankruptcy, antitrust, securities
E. misc economic regulation and benefits
F. property disputes
G. other
Answer:

Answer: D