Which of the following situations best falls under the heading of cyclical unemployment? A. John is laid off from work at an auto assembly because people just aren't spending during the current recession. B. Trish is laid off from her work as a typist because word processors have reduced the need for secretarial support. C. Ellen sees a commercial on afternoon television and quits her job at Burger King to train for the joys of driving the big rigs on the open roads. D. George is let go from his job as a roofer because the construction business is slow during the winter.