This Textbook Is About Microeconomics Because It Deals Mainly with the Behavior

This textbook is about microeconomics because it deals mainly with the behavior of variables such as:

A) national output, interest rates, unemployment and inflation.
B) individual economic units, such as consumers, firms, workers and investors.
C) national and international markets, exchange rates and economic treaties.
D) economic sectors, the business cycle and monetary and fiscal policies.