单选题
编号：2693359
1. Which of the following statements concerning the HerfindahI-Hirschman Index (HHI) is most accurate?
- A.The HHI is a useful measure of potential barriers to entry.
- B.An HHI of 0.05 would be analogous to having the market shared equally by 20 firms.
- C.The HHI is usually unaffected by mergers among the top market incumbents.