An Unemployed Worker Can Be Identified as Being "Structurally" Unemployed

An unemployed worker can be identified as being "structurally" unemployed if

A) the worker wants to work only during certain months of the year.
B) the worker quits a job in order to search for a better one.
C) there is a recession and the worker is laid off.
D) the worker has a different set of skills than what is desired by firms.
E) minimum wage laws prevent the worker from finding a job.