Answer:
B. studies the behavior of the economy as a whole.
Explanation:
Macroeconomics -
The word Macroeconomics is bifurcated into macro , which means huge , and economics ,
It is one of the branch of economics , which deals with the behavior , decision - making , structure of the economy as a complete whole unit .
It is very inclusive unit with including , national , regional and global economies .
Hence , from the options given in the question , the correct answer is B. studies the behavior of the economy as a whole . Â