(asap! ) a cost benefit a) weighs benefits against costs b) is subjective c) is based on personal and opinions d) all of the above

All Of The Above

       Explanation:

A cost benefit analysis (CBA) estimates and/or totals up the amount of money a certain place or organization takes up. Based on that sum of money, the CBA decides if the place or organization is useful or needs to be there, or if they are just wasting money. The CBA determines whether to keep the place / organization using opinions and it is subjective, subjective meaning based on or influenced by personal feelings, tastes, or opinions.

The CBA weighs benefits against cost. This means that they take the sum of money that "thing" uses and weighs that against how useful it is, what benefits it has, and how much people use and need it.  These projects may be dams and highways or can be training programs and health care systems. If they take up to much money and are not used, they are taken out.

Mordancy.

answercompetitive advantage;