Answer:
The correct answers are as follows;
(a) The effect of government regulation on a monopolist's production decisions macroeconomics
(b) The effect of a large government budget deficit on the economy's price level macroeconomics
(c) The effects of the Internet on the pricing of used cars microeconomics
Explanation:
Microeconomics is the study of individuals and business decisions, while macroeconomics looks at the decisions of countries and governments.