The unemployment rate is expected to fall in December this year and rise again in January of 2022. What explains this?

a.Structural unemployment, as workers lose their skills at the end of every year.

b.Frictional unemployment, as all firms renew their contracts January 1st of each year.

c.Seasonal unemployment, as Christmas comes every year.

d.Cyclical unemployment, as every year is the begining of a new cycle.