The correct option is B GDP calculates goods and services produced by a country's citizens, whereas NNP considers domestic production as well as production of overseas citizens.
Both economic indicators, i.e., GDP and NNP, calculate the money value of the goods and services produced by a country. In case of GDP, the value is calculated only for domestic productions. On the other hand, NNP also includes the value of goods and services produced by overseas citizens of the country.