The correct answer is: B. production, distribution and exchange.
Economics is the study of how people make choices under conditions of scarcity. It is a social science that seeks to understand how economic agents interact with each other and with the environment. Economics is concerned with the production, distribution, and consumption of goods and services. It also studies the factors that influence the prices of goods and services.
Option A is incorrect because it is too narrow. Economics is not just about the distribution of scarce goods. It is also about the production and exchange of goods and services.
Option C is incorrect because it is too narrow. Economics is not just about the production and pricing of durable commodities. It is also about the production and exchange of all goods and services.
Option D is incorrect because it is too narrow. Economics is not just about the exchange of services for money. It is also about the production and distribution of goods and services.