The study of how people make decisions when dealing with scarcity is the best description of Economics. Hence, option A is correct.
What is scarcity of resources?
Scarcity of resources is the result of constrained resources and seemingly insatiable human needs. Natural resources are few, and as population increases, so are needs and desires. To meet everyone's demands, there aren't enough resources, though.
People must prioritize their most crucial requirements in order to make the most of the resources they do have as resources are not distributed fairly among people.
Thus, option A is correct.
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