Which of the Following Is True About Income Distribution

Which of the following is true about income distribution?

A) The best distribution of income can be determined objectively.
B) The transfer of income from one group to another is costly; it will generally reduce total output.
C) Positive economics can determine the variation in incomes that would be best for an economy.
D) The fairness of an income distribution is determined by its pattern (the measured degree of income inequality) .
E) All of the above are true.