Which of the Following Best Describes Regression to the Mean

Multiple Choice

Which of the following best describes regression to the mean??

A) Quiet periods in markets are punctuated by fundamental "shocks" or "discontinuities" that destroy old sources of advantage and replace them with new ones
B) The optimal allocation of society's resources at a given point in time
C) Clusters of activities that a firm does especially well in comparison with other firms
D) A firm does exceedingly well due to good luck or exceedingly poorly due to bad luck,but returns to normal performance following
E) None of the above