The study of how people make decisions when dealing with scarcity is the best description of Economics. Hence, option A is correct.
Scarcity of resources refers to limited resources combined with the unlimited desires of people all over the world. The natural resources are limited and with the increasing population, the needs and wants of the people are rising, but the resources are not enough to supply all the people.
People's resources are divided unequally among the people, so the people have to settle for the limited resources and prioritize the things that are most essential for them.
Thus, option A is correct.
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