What Has Happened to Per Capita Income and the Degree

What has happened to per capita income and the degree of income inequality of the world during the past three decades?

A) The rich countries have gotten richer and the poor countries poorer.
B) Per capita income has increased in both rich and poor countries, but the worldwide distribution of Income has become less equal.
C) Per capita income has declined in both rich and poor countries, and the worldwide distribution of income has become more equal.
D) Per capita income has increased in both rich and poor countries, and the worldwide distribution of income has become more equal.