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

Since the mid-1970s, how has class inequality in the United States changed?

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