The U.S. Gini Coefficient Shows That Income Inequality

The U.S. Gini coefficient shows that income inequality

A) increased steadily over the last four decades
B) remained fairly constant in the 1970s, and then increased steadily through the 1980s and 1990s
C) increased gradually over the period 1947-1968, and then declined steadily through the 1990s
D) has changed little over the last four decades
E) has declined in relation to other developed economies