单选题
Six companies in an industry have the following market shares:
| Company | A | B | C | D | E | F |
| Market Share（%） | 30 | 25 | 16 | 12 | 10 | 7 |
If Companies D and F merge into a new Company, G, the industry's three-company concentration ratio would be closest to:
【正确答案】
B
【答案解析】
The concentration ratio for the top three companies would be 74%:
