Suppose that in 2011, per-person GDP in Singapore was $53,591, and in Egypt, it was $5,547, as measured in 2005 purchasing power parity U. S. dollars. It is accurate to say that the income level in Singapore is higher / lower than in Egypt. Why is this comparison accurate?
a. There are significant differences in incomes between high- and low-income countries.
b. Egypt is characterized by a higher share of industrial production in total output than Singapore is.
c. Singapore is characterized by a larger share of household production in total output than Egypt is.
d. Egypt is characterized by a larger share of household production in total output than Singapore is.