Answer it correctly please. I will rate accordingly with multiple votes. Answer only if 100% sure.

Which of the following statements is true regarding economic growth and development? O a. The income gap between the top 10% and bottom 10% countries has increased over the past few centuries O b. A country's relative position in the world distribution of per capita incomes is immutable O c. The income growth rates of developing countries do not vary much. O d. The growth of world per capita GDP slowed down over the past five centuries