Which of the following is a drawback of using the industry life cycle as a framework to guide strategic choice?
选项：

A: The framework believes that the life cycle of industries is unpredictable.
B: The framework does not explain everything about changes in industries.
C: The framework is based on the tenet that industries can be rejuvenated even in the declining stage.
D: The framework believes that the number and size of competitors remain constant throughout the life cycle.