D) President Kennedy outlines how the world is very different, and it is important for Americans to stand together and support the United Nations in its quest for peace.
Explanation:
President Kennedy adresses the nation and the world in his inaugural speech with the idea of defending freedom and supporting the UNited Nations in the pursue of a better world, and he invites americans to get on board with the idea of helping one another, and says his famouse phrase "Do not ask what your country can do for you, ask what can you do for your country". He faces how we lived in a different world and how americans should stand together against those who are a threat to freedom and prosperity.
Answer: A short example of one way life was different in the 1800's from today is technology. In the 1820s, the very first mechanical computer was made. Since then technology has improved greatly.
