Mismatch and Turnover Unemployment,while Conceptually Easy to Distinguish,are Often Difficult

Mismatch and turnover unemployment,while conceptually easy to distinguish,are often difficult to identify.Ceteris paribus,a person out of work for two months would be classified by Gordon as

A) experiencing turnover unemployment.
B) experiencing mismatch unemployment.
C) impossible to distinguish the type.
D) first frictionally unemployed (the first month) and then structurally unemployed.