The negative variation proposed between the Scoob scale and the given option of 2% in letter "b" is plausible, while the other propositions should tend to follow major market numbers.
Frictional unemployment is characterized by being an exceptional situation where employees decide to migrate from one job to another looking for better working conditions and wages, differing from the rest of the unemployment definitions which logic/reason departs from the market or government issues. In frictional, its a matter of choice, and choice does not necessarily need to be ruled by market or job/economic policy conditions.