Which of the following equations is the correct one about Net National Product (NNP)?

• A.NNP = Gross National Product (GNP) - Depreciation
• B.NNP = Gross National Product (GNP) + Net incomes form abroad
• C.NNP = Gross Domestic Product (GDP) - Depreciation
• D.NNP = Gross Domestic Product (GDP) - Net incomes from abroad.