问题如下：
For an industry that involves high fixed capital investment, a good way to improve profit growth is:
选项：
A. pursuing economies of scale.
B. removing features that differentiate the product or service provided.
C. pursuing diseconomies of scale.
解释：
A is correct.
For an industry that involves high fixed capital investment, pursuing economies of scale is a good way to reduce costs per unit and increase profit.
想问一下老师选项B怎么理解呢？谢谢