1. Consider country A. Its GDP is 1000 and its GNP is 1000. Among three cases below, choose the one which is consistent with the two numbers. (In this question, we assume that labor is the only factor of production.) A. Some foreigners work in country A, but no country A's citizen works in foreign countries. B. Some of country A's citizens work in foreign countries, but no foreigner works in A. C. No foreigner works in A, and no A's citizen works in foreign countries