Answer: D
Step-by-step explanation:
Looking at the time this speech was delivered (January 1961), we know that the US had just changed presidents, as JFK was new in the office, and we also know that the US was in the Cold War with the Soviet Union.
The freedom of man does not relate to what percentage of Americans live above or below the poverty line, so you can ignore the first two choices.
Although the freedom to vote in elections does relate to the freedom of man, it doesn't inherently relate to Kennedy being elected.
The correct choice is D. Americans at the time of the speech were at large concerned about the freedom of mankind in communist societies.