Concept:The difference between GDP and GNP is the net factor income earned from abroad.Explanation:GDP measures the value of goods and services produced within a country's borders, regardless of who earns the income.GNP measures the value of goods and services produced by the residents of a country, whether they are at home or abroad.The formula connecting them is:GNP=GDP+Net factor income from abroad.Thus, GNP differs from GDP only by this net income received from abroad.Answer:C. net factor income from abroad