People come to different decisions using cost-benefit analysis even under the same conditions because costs and benefits are both what?
A. Subjective
B. Absolute
C. Utilities
O D. Non-monetary

The correct answer is A. Subjective.  

Explanation:

The execution, maintenance or inhibition of a behavior is based on a subjective analysis of the “costs and benefits” of the consequences for each of these cases. In this analysis, if the benefits are greater than the costs of a conduct or behavior, this will be maintained over time by simple positive feedback. All our decisions are determined by the result of an internal evaluation that the person makes of the environment (and its triggers) and its eventual consequences. That is, the decision is subject to the evaluation of its costs and benefits. If the benefits that the consequence of a decision will bring are greater (for the person and their environment) than the associated costs of emitting it, then the decision tends to be maintained, since it receives a source of feedback in itself (benefits).However, as the reflection prior to the emission of a behavior is subjective, since each of us evaluates the environment from our experiences, interests, motivations and expectations, then we add to the analysis the possibility that there are different versions or definitions of what which could be considered as "cost" or "benefit".

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your friend,

the answer is:

c. economic output