b选项

问题如下：

Which of the following statements about Porter's Five Forces is most accurate?

选项：

A.

Porter's Five Forces framework cannot be applied to new industries for which historical data is not available

B.

Assessing the barriers to exiting an industry should be considered when assessing the threat of new entrants

C.

Porter's Five Forces is a framework for assessing industry structure that determines an industry's long-run profitability

解释：

C is Correct because Porter's Five Forces is a framework for assessing industry structure that determines an industry's long-run profitability measure by its returns on invested capital.

A is incorrect because for new industries for which data are unavailable or which are still in an early, unprofitable stage, the Porter analysis of industry structure can help point to potential profitability levels. Hence, Porter's Five Force's framework can still be applied, and would be especially useful, for new industries.

B is incorrect because assessing the barriers to exiting an industry should be considered when assessing the rivalry among existing competitors, not when assessing the threat of new entrants. If exiting an industry is difficult or costly, such as shutting down natural resource producing assets, companies with low profitability may remain in the industry for much longer than in other industries, which can result in lingering competition.