Great Society and Healthcare Legislative Acts

During the 1960s, President Lyndon B. Johnson launched a series of programs known as the Great Society, aimed at eliminating poverty and racial injustice in the United States. The initiatives included landmark legislation and created various government agencies. However, the effectiveness and consequences of the Great Society programs have been debated among historians and political scientists. Which of the following legislative acts was primarily aimed at addressing issues of public health and healthcare access, a central component of the Great Society?