Answer : A) The reasons why Kathy buys less orange Juice.
Reason:
Microeconomics is a branch of economics that studies the behaviour of individuals and firms in making decisions regarding the allocation of scarce resources and the interactions among these individuals and firms.
In short , we can say that microeconomics deals we individuals.
While macroeconomics involves the sum total of economic activity, dealing with the issues of growth, inflation, and unemployment and with national policies relating to these issues.