The correct answer is C. normative economics.
Normative economics is a branch of economics that deals with the study of what should be. It is concerned with making judgments about economic policy and the allocation of resources. Normative economics is based on value judgments, which are subjective opinions about what is good or bad.
Microeconomics is a branch of economics that deals with the study of individual economic units, such as households and firms. Microeconomics is concerned with the behavior of these units and the way they interact with each other.
Macroeconomics is a branch of economics that deals with the study of the economy as a whole. Macroeconomics is concerned with the performance of the economy, such as inflation, unemployment, and economic growth.
Positive economics is a branch of economics that deals with the study of what is. It is concerned with describing and explaining economic phenomena. Positive economics is based on objective facts, which are not subject to value judgments.