The Main Difference Between Macroeconomics and Microeconomics Is That

The main difference between macroeconomics and microeconomics is that:

A) microeconomics largely deals with the fallacy of composition,and macroeconomics does not deal with the fallacy of composition.
B) macroeconomics focuses on the aggregate economy,and microeconomics focuses on small components of that economy.
C) macroeconomics looks at how individuals make choices,and microeconomics looks at the aggregate of those choices.
D) macroeconomics is concerned with economic policy,and microeconomics is concerned with international policies.