The 1935 social security act paid retirees a stipend based on

their lifetime investments and bank account savings.
their physical condition at the time of retirement.
the number of children that had been in their families.
the amount they had contributed to the fund.

The 1935 Social Security Act paid retirees a stipend based on the amount they had contributed to the fund. Option D is correct.

In 1935 President Franklin D. Roosevelt signed into law the Social Security Act and this created Social Security, a federal safety net for elderly, unemployed and disadvantaged Americans.

The fundamental stipulation of the original Social Security Act was to pay financial benefits to retirees over age 65 based on lifetime payroll tax contributions.

"the amount they had contributed to the fund."

Explanation:

The Social Security Act is a federal law of the United States approved by Congress on August 14, 1935, establishing the first norm of a US public administration aimed at sustaining a welfare state.

The law was enacted in the context of the New Deal promoted by President Franklin D. Roosevelt and gave a definitive character to local measures of assistance to elderly people who had become seriously impoverished as a result of the Great Depression.

The levels of poverty and unemployment had increased greatly in the United States as a result of the Great Depression, and a group that was particularly disadvantaged was elderly citizens, for whom "social insurance" of a very basic level was created. However, the New Deal encouraged these social benefit policies to be protected by a federal law designed to protect the elderly, unemployed, widows, and orphans.

The new law established a social protection system at the federal level: retirement for people over 65 years old, insurance against unemployment and various aids for the disabled, but the diseases and disability were not covered. The blind and handicapped children received grants financed by federal grants awarded in the states. Progressively, the system covered a wider part of the population, particularly thanks to the 1939 and 1950 amendments, but initially it was restricted to the limits initially imposed by Roosevelt.

d) in the state of iowa