The basic difference between macroeconomics and microeconomics is that
A.
macroeconomics is concerned with the forest (aggregate markets), while microeconomics is concerned with the individual trees (subcomponents).
B.
macroeconomics is concerned with policy decisions, while microeconomics applies only to theory.
C.
microeconomics is concerned with the forest (aggregate markets), while macroeconomics is concerned with the trees (subcomponents).
D.
opportunity cost is applicable to macroeconomics, and the fallacy of composition relates to microeconomics.