Dramatic irony means that the audience knows something the characters do not. For example, in the beginning of Hamlet, we know immediately that Claudius was the one who killed Hamlet's father, however, he doesn't know that from the very start.
A to inform about the paragraph
Answer:
b) It supports the idea that while the country will seek peace and help other countries, it will not be a weak victim to others.
Explanation:
In the speech Kennedy talks about how the country will seek to maintain peace and help its neighbors to be free, strong and prosperous. In that way, by establishing peace and helping neighboring countries, the US will not be a weak victim for any nation. Basically, Kennedy said that once neighbors were helped, they would not turn their backs when the US needed help and that would always keep the country strong.