Duration of a Business Cycle Refers To

Duration of a business cycle refers to:

A) the length of time from one business cycle peak to the next.
B) how low a trough or how high a peak of a business cycle is.
C) which segments of the economy are affected by a recession in a business cycle.
D) whether the bottom of the cycle is a depression.
E) how long it takes for the average business to exit its industry.