Which of the following statements is true about gross national income (GNI)?
a. GNI per person figures take into account national differences in the cost of living.
b. The large countries of China and India are among the richest on the measure of GNI per capita.
c. The GNI data gives a dynamic picture of economic development. Economist
d. Amartya Sen has argued that development should be assessed less by material output measures such as GNI per capita.