The Federal Government's Spending on Aid to Families with Dependent

The federal government's spending on Aid to Families with Dependent Children fell after the mid-1970s because

A) the Supreme Court's decision in Goldberg v. Kelly prohibited more than 15 percent of the budget from being spent on welfare.
B) unlike Social Security, the program was not indexed to inflation.
C) fewer and fewer people needed the benefits provided by the program.
D) the program's cost-of-living adjustments were linked to real gross domestic product rather than to inflation.