GNP is the sum of all the wealth produced by companies belonging to a country, regardless of where they are operating. In this way, it counts for the GNP all the production of American companies produced within the country or outside the country. However, the value of the production of foreign companies operating on American soil is not included in the account.
In this way, items (II) and (IV) are correct. The food of a restaurant in Chicago and the clothes of an American company.
