Macroeconomics is the study of A. how households and firms make choices. B. the economy as a whole. C. how firms make choices. D. how households make choices.

A. how households and firms make choices.

Explanation:

Indeed, macroeconomics studies how an economy functions in the global perspective when using aggregators that are compared in international rankings.

Macroeconomics studies how GDP, gross domestic product forms, how high or low the unemployment is in a given country and how to price indices change over time.

The different sectors of the economy are seen in panoramic view to understand how a country economy goes seeking important economic goals: economic growth.