What Do International GDP and Socioeconomic Data Show

What do international GDP and socioeconomic data show?

A) They are inconclusive about the relationship between GDP and the economic well-being of citizens.
B) They suggest that GDP is a weak measure of a country's well-being.
C) They leave no doubt that a nation's GDP is closely associated with its citizens' standard of living.
D) They indicate that there are few real differences in living standards around the world, in spite of the large differences in GDP between nations.