If a Nation's Lorenz Curve Lies on the 45 Degree

If a nation's Lorenz curve lies on the 45 degree line of income equality, then

A) more of the nation's income is received by the lowest 25 percent of families than by the highest 25 percent.
B) every household's income level is different.
C) more of the nation's income is received by the highest 25 percent of families than by the lowest percent.
D) the income received by each 25 percent of families is 25 percent of the total income.