Since the Mid-1970s, Class Inequality in the United States Has

Since the mid-1970s, class inequality in the United States has:

A) decreased as income and wealth have been disbursed from the wealthy elite down to the middle- and lower-class social strata.
B) increased due to decreasing tax rates for the wealthy and stagnating salaries for the middle class.
C) held steady as tax breaks for the wealthy have been balanced by increased salaries in the middle class.
D) decreased as a result of increased tax rates on the wealthy and redistribution of benefits to the poor.
E) fluctuated wildly as the middle class booms and stagnates at irregular intervals.