Task: songer_casetyp1_1-3-1

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 "criminal - federal offense". 

PER CURIAM.
Indicted for, and convicted of, a violation of Section 2421, Title 18 U.S.C., transporting a woman in interstate commerce for the purpose of practicing prostitution, defendant has appealed. Here, putting forward four specifications of error, appellant insists that they are well taken, and, because they are, the judgment must be reversed.
We cannot agree. Indeed, we think it plain that, varying in degree from the inexcusably frivolous claim of point A of the first specification, that the proof fails to show that the so-called victim was a woman, to the little less frivolous one, that the woman could not, because of the claimed marriage to defendant, testify against him in the case, all of the claims of error are wanting in substance and the judgment must be affirmed.
Affirmed.

Question: What is the specific issue in the case within the general category of "criminal - federal offense"?
A. murder
B. rape
C. arson
D. aggravated assault
E. robbery
F. burglary
G. auto theft
H. larceny (over $50)
I. other violent crimes
J. narcotics
K. alcohol related crimes, prohibition
L. tax fraud
M. firearm violations
N. morals charges (e.g., gambling, prostitution, obscenity)
O. criminal violations of government regulations of business
P. other white collar crime (involving no force or threat of force; e.g., embezzlement, computer fraud,bribery)
Q. other crimes
R. federal offense, but specific crime not ascertained
Answer:

Answer: N