The decrease in revenue from Social Insurance and Retirement over the past 40 years is explained by —
A. an increase in people leaving the workforce
B. a decrease in individual income taxes
C. a decrease in the number of poor people
D. the growth in size of the federal government
![The decrease in revenue from Social Insurance and Retirement over the past 40 years is explained by A an increase in people leaving the workforce B a decrease i class=](https://us-static.z-dn.net/files/d55/1be548143874758c70c6f68b39f747ad.png)