What social scientist primarily study the scarcity of resources and the distribution of goods and services

An economist primarily studies that topic

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

the correct answer is: the fact that the anti-federalist papers were considered poorly written.