Answer:
(C) A government deciding which products to tax
Step-by-step explanation:
Microeconomics is the subdivision of economics that studies the economic decisions of individuals, households, and firms. It is concerned with around how firms and households allocate scarce resources to meet different needs. It analyses how limited resources are distributed to many alternatives.
Microeconomics deals with individual choices, the factors that influence those choices, and how those decisions influence supply and demand in individual markets. Tax decisions affect the entire economy and not individual markets. Government decisions on taxation are concerns of Macroeconomics.