Final answer:
President Kennedy succeeded in passing measures for lower taxes and urban renewal, but full healthcare for all was not achieved during his term. Medicare, which is a federal healthcare program for the elderly, was passed later under President Johnson.
Step-by-step explanation:
The measures that President Kennedy succeeded in passing included lower taxes and urban renewal initiatives. While Kennedy did propose policies to provide medical care to the elderly, increase federal spending on education, and battle poverty, not all of these were passed during his presidency. The specific policy related to healthcare that was passed later under Johnson's administration was Medicare, which is a program that provides federal funding for healthcare for the elderly, not for all Americans. During Kennedy's time, efforts were made toward economic aid for rural areas, and some urban renewal programs were carried out, although these were at times controversial and had mixed results in helping the urban poor. Therefore, the correct answer to the student's question is A. Lower taxes.