Final answer:
In Economics, a subjective decision involves calculating the utility of each factor to make a decision based on marginal utility.
Step-by-step explanation:
The subject of this question is Economics. In decision making, a subjective decision involves calculating the utility or satisfaction of each factor involved, in order to make a decision. Marginal utility refers to the additional utility gained from consuming one additional unit of a good or service. By comparing the marginal utility of different goods or services, individuals can make choices that maximize their overall satisfaction.