From 1980 to 2009, the Female-Male Wage Ratio in the United

From 1980 to 2009, the female-male wage ratio in the United States

A) held constant at about 0.7.
B) fell steadily from about 1.0 in 1980 to 0.5 in 2009.
C) increased modestly from 0.5 in 1980 to almost 0.6 in 2009.
D) increased substantially from 0.6 in 1980 to almost 0.8 in 2009.
E) increased substantially from 0.4 in 1980 to over 0.7 in 2009.