Which of the Following Best States John Rawls's Argument for Income

Which of the following best states John Rawls's argument for income equality?

A) A dollar taken from a rich man and given to a poor man provides the poor man with more satisfaction than the rich man loses.
B) Income equality encourages people to take risks and to become more productive.
C) If people were framing a constitution for society without knowing what their class position would be, they would opt for equality.
D) Greater income equality leads to significantly higher rates of capital formation.
E) Political freedom and economic equality can only be achieved with a perfectly equal distribution of income.