Linking Social Security Payments to a Person's Employment History

Linking Social Security payments to a person's employment history,

A) distinguished between people who were considered deserving and undeserving of government financial support in their old age
B) ensured that people would not take more in Social Security benefits than they put in
C) ensured that people paid their own Social Security benefits rather than relying on future earners for it
D) ensured that all people would be eligible for Social Security benefits