Task: songer_casetyp1_1-3-3

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 - not determined whether state or federal offense". 

PER CURIAM:
The sole issue in this case is whether the appellant may raise under the plain error doctrine a sentencing error which was not objected to at the time of sentencing.
At sentencing, the district court followed to the letter the procedure mandated by this court in United States v. Jones, 899 F.2d 1097 (11th Cir.), cert. denied, — U.S. -, 111 S.Ct. 275, 112 L.Ed.2d 230 (1990), and the appellant did not object to the sentence or the sentencing process on the basis of an ex-post facto violation. He seeks to raise that claim on appeal. We hold that the ex-post facto claim has been waived. To hold otherwise would nullify our recent holding in Jones.
Accordingly, the district court is affirmed.
AFFIRMED.

Question: What is the specific issue in the case within the general category of "criminal - not determined whether state or 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. specific crime not ascertained
Answer:

Answer: R