What publication year was the first SSI federal regulation issued?

The correct choice indicates that the first federal regulation regarding Supplemental Security Income (SSI) was issued in 1976. This regulation was a significant milestone as it established the framework for the SSI program, which was created to provide financial assistance to individuals with low income who are aged, blind, or disabled.

Understanding the historical context of this regulation is important, as it reflects the government's commitment to supporting vulnerable populations. The SSI program was designed to ensure that individuals have access to minimum financial support and was an essential part of the broader social safety net policies in the United States at that time. Other years listed do not correspond to the initiation of this particular regulation, which emphasizes the importance of recognizing the correct timeline of social welfare legislation.