Final answer:
If business cycles were pure cycles, they would have a constant periodicity or frequency.
Step-by-step explanation:
If business cycles were pure cycles, the statement b. would have constant periodicity is true.
Business cycles are not pure cycles, as they do not follow a mechanical or predictable periodic pattern. However, if they were pure cycles, they would have a constant periodicity or frequency. This means that the cycles would repeat at regular intervals and maintain the same frequency over time.
For example, if the business cycle had a periodicity of 5 years, it would go through phases of expansion and contraction every 5 years, without any variation or deviation.