Which of the Following Statement(s) Is(are) True

Which of the following statement(s) is(are) true?

A) Differences in per capita incomes across countries are much greater than within any single country.
B) Worldwide (global) income inequality has been reduced during the post-World War II period.
C) The higher the Gini coefficient the more equal is the income distribution.
D) All of the above.
E) None of the above.