The Cost-Benefit Principle indicates that an action should be taken if:

题目：The Cost-Benefit Principle indicates that an action should be taken if:

The Cost-Benefit Principle indicates that an action should be taken if:

A.its average benefits exceed its average costs.

B.its extra benefit is greater than or equal to its extra cost.

C.its total benefits exceed its total costs.

D.its net benefit (benefit minus cost) is zero.


正确答案：its extra benefit is greater than or equal to its extra cost.