The correct answer is 3) economists.
The social scientists that primarily study the scarcity of resources and the distribution of goods and services are the economists.
Economics is the social science that studies how products and services are produced, distributed and how people consume those goods and services. Economists pay close attention to the way economic agents work and affect the market. They know that buyers, sellers, households, and companies played an important role in the economy of a nation, so economists try to understand these relationships and how they affect the market.