Macroeconomics:
a. studies the effects of management decisions made on the margin.
c. studies the economy as a whole.
b. studies the productivity of entrepreneurial decisions on a grand scale.
d. is another name for microeconomics.

The answer is C. Macroeconomics is the study of an economy as a whole rather than individual markets. It explains the economic processes in a large market that share the same features. Macroeconomics investigates economic behavior by simplifying it through assumptions and from these models are made. Additionally, macroeconomics cannot be conducted through scientific experiments but only on observations.

Need a picture of the map