Answer:
D). Policies passed by the Nixon administration helped to stop the rise in the cost of living, which improved the economy.
Explanation:
The last statement most aptly describes the changes that took place in the United States' cost of living across the years 1970-73. President Richard Nixon who joined the office in 1969 passed effective economic policies(Nixon shocks, his budget plan, etc.) that assisted in putting a halt in the 'cost of living.' This reduction in the cost of living helped in reducing the rate of inflation, stabilizing, and improving the condition of the economy. Thus, option D is the correct answer.
