问题如下：
Which of the following is not a good example of highly concentrated industries in which firms’ pricing power is relatively strong?
选项：
A. Alcohol.
B. Automobiles.
C. Tobacco.
解释：
B is correct.
Automobiles industry is an example of highly concentrated industries with relatively weak pricing power. While tobacco and alcoholic industries are highly concentrated and possesses strong pricing power.
集中的行业是什么意思？？
