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".

Opinion:
Leonard S. BERMAN, Appellant, v. Marjorie M. BERMAN, a/k/a Marjorie M. Wise, and David Wise, Jr., Appellees.
No. 12699.
United States Court of Appeals District of Columbia Circuit.
Argued Oct. 25, 1955.
Decided Nov. 23, 1955.
Mr. Victor A. DeLeon, Washington, D. C., for appellant.
Mr. Alvin L. Newmyer, Washington, D. C., with whom Mr. Alvin L. Newmyer, Jr., Washington, D. C., was on the brief, for appellees. Mr. David G. Bress, Washington, D. C., also entered an appearance for appellees.
Before EDGERTON, Chief Judge, and WILBUR K. MILLER and BASTIAN, Circuit Judges.
PER CURIAM.
On January 13, 1954, in the District of Columbia, appellee Marjorie got a judgment against appellant, who was then her husband, for separate maintenance (“alimony”) and also for maintenance of their minor childfen. She got a divorce from appellant in Nevada January 19, 1954, and married appellee Wise September 15, 1954. On November 24, 1954, our District Court amended its judgment of January 13 by striking the award of alimony. Though this amendatory judgment relieving appellant of his obligation to pay alimony was entered “by consent”, he afterwards filed the present suit for a declaratory judgment that the Nevada divorce is void. The District Court did not err or abuse its discretion in dismissing the complaint.
Affirmed.

Question: What is the specific issue in the case within the general category of "economic activity and regulation"?

Choices:
taxes, patents, copyright
torts
commercial disputes
bankruptcy, antitrust, securities
misc economic regulation and benefits
property disputes
other

Answer: 6