The Fact That Business Cycles Are Recurrent but Not Periodic

Multiple Choice

The fact that business cycles are recurrent but not periodic means that

A) business cycles occur at predictable intervals, but do not last a predetermined length of time.
B) the business cycle's standard contraction-trough-expansion-peak pattern has been observed to occur over and over again, but not at predictable intervals.
C) business cycles occur at predictable intervals, but do not all follow a standard contraction-trough-expansion-peak pattern.
D) business cycles last a predetermined length of time, but do not all follow a standard contraction-trough-expansion-peak pattern.