Which of the following statements accurately differentiates between Social Security and Supplemental Security Income (SSI) beneficiaries?
a. Social Security benefits are based on an individual's work history and earnings, while SSI benefits are based on financial need regardless of work history.
b. Social Security benefits are available only to retirees, while SSI benefits are only for people with disabilities.
c. Both Social Security and SSI benefits are funded by the same federal program and have the same eligibility requirements.
d. Social Security benefits provide a fixed amount based on age, while SSI benefits are adjusted annually for inflation.