Which of the Following Is an Example of Frictional Unemployment

Which of the following is an example of frictional unemployment?

A) Raymond loses his job as a steel worker because the economy is in a downturn.
B) Chad graduates with his master's degree in economics and is searching for an analyst job.
C) Edith has decided to retire after 35 years of working at the state prison.
D) Cameron quits his job at the circus to volunteer for the Red Cross.
E) Jasmine loses her job as a newspaper editor because the publication has gone digital.