"Net foreign factor income" in the national income accounts refers to the difference between: A. The income Americans gain from supplying resources abroad and the income that foreigners gain by supplying resources in the U. S. B. The value of products sold by Americans to other nations and the value of products bought by Americans from other nations C. The value of investments that Americans made abroad and the value of investments made by foreigners in the U. S. D. The income earned by Americans abroad and the income of foreign workers in the U. S.