Which of the following represents frictional unemployment? i) The demand for refrigerators falls when the economy enters a recession, and refrigerator manufacturers lay off some of their workers. ii) The shale gas business shuts its doors nationwide due to low gas prices. iii) You tire of working as a waiter and quit. Now you are searching for work as an actor. iv) Juan's fishing business can't cover its costs, so it closes. Juan is now looking for a new job. Choose one: O A. ii, iii, and iv O B. only iii O C. i and iv O D. iii and iv O E. ii and