Answer:
A. Micro-economics
Step-by-step explanation:
Micro-Economics represents a study of economic activiites or economic choices that affect individual businesses or organisations, individual consumers or individual families. Since the focus of Williams & Co is on determining appropriate prices for products sold in its individual firm, then the focus is micro-economics
Macro Economics represents the study of economic activities and choices but instead of the individual level, it studies these acivities at the overall national level or at the global level. So the study of pricing among the various detergent producing firms in the United States is under the purview of macro economics
Monetary policy focuses on the tools that are used to regulate the entire economy especially the Federal Reserve through the regulation of the activities of member financial institutions.
Fiscal Policy focuses on the activities of government to control its expenditure, tax rates and overall monitor or regulate the economy