Final answer:
Lyndon B. Johnson's speech is similar to John F. Kennedy's in addressing the challenges of a changing world, both focusing on using America's wealth for societal improvement and lasting social change. The correct answer is option c.
Step-by-step explanation:
Lyndon B. Johnson's speech mirrors John F. Kennedy's in its call to address the challenges of a changing world. Both presidents shared a focus on creating a more just and prosperous society, utilizing America's wealth not simply for economic growth, but for the improvement of American civilization. While Kennedy spoke of the 'new frontier' and was driven by a vision that included civil rights and anti-poverty initiatives, Johnson's 'Great Society' focused on similar issues such as the eradication of poverty and racial injustice, universal education, and healthcare reform. Both leaders presented their visions as forward-looking and foundational to lasting social change, reflecting the urgent necessity to adapt to and shape the evolving societal landscape.