An Important Distinction Between Microeconomics and Macroeconomics Is That

An important distinction between microeconomics and macroeconomics is that

A) only microeconomics is concerned with the behavior of firms.
B) only microeconomics is concerned with consumer behavior.
C) macroeconomics is not concerned with the organization of the labor markets and industry.
D) macroeconomics tries to explain the determination of variables that microeconomists take as given.
E) all of the above.