Answer: b. Having a stable job with a high salary
Step-by-step explanation:
The Cost-benefit analysis takes into account the costs and rewards of doing something. It however only takes into account costs and benefits that are directly attributable to the thing in question.
The Cost benefit analysis of going to college for instance would include the cost of college which is having to take a student loan most times and therefore incurring debt.
The benefits however include, having an education and getting a degree.
Getting a degree is not a guarantee that you will get a stable job with a high salary so this is not directly related to going to college and so cannot factor into the cost benefit analysis of college.