1.- Sales of used goods are not counted. It has sense because if they were counted we would have double the counting.
2.- Goods and services that are sold in the black market or illegal goods and services because they are extremely difficult to count.
3. Intermediate goods that are used to produce other final goods because the counting of intermediate goods counting will lead to double counting .
The answer would be letter C. The branch of ethical theory that considers the origin and meaning of ethical principles is known as Meta ethics. Meta ethics is one of the four branches of ethics and the rest are descriptive ethics, normative ethics, and applied ethics.