Great Society Legislation Question

During the 1960s, President Lyndon B. Johnson initiated a series of domestic programs aimed at eliminating poverty and racial injustice, collectively known as the Great Society. These programs addressed various issues including education, healthcare, and civil rights. One of the most significant measures enacted through the Great Society was the establishment of Medicare and Medicaid, which aimed to provide health insurance for the elderly and low-income individuals, respectively.

In light of this context, which of the following pieces of legislation is most closely associated with the objectives of the Great Society?