The correct answer is C. Consumer behavior and preferences
Step-by-step explanation:
Microeconomics focuses on studying the use of resources and economic factors in individuals. This includes the way individuals make decisions when consuming services and products and the way this affects major economic factors such as demand and supply. In these terms, the area that involves microeconomics is "Consumer behavior and preferences" because this area implies individuals' behavior and decisions related to the economy which is the focus of microeconomics. Also, others such as unemployment or national income belong to macroeconomics as they are part of broader aspects of the economy.