Based on the given excerpt, President Kennedy stressed his point by using anaphora to emphasize the lack of equality. Anaphora is a writing technique which refers to the intentional repetition of the first part of the sentence, in this case, the words that were repeated are: "It ought to be possible..."
B would be the correct answer
One of the richest men in the world is the appositive.
It has a comma that separates it from the rest of the sentence and the sentence makes sense without it as "Bill Gates started Microsoft."
If Bill Gates had a comma after it, it would be the apositive and the sentence would be "One of the richest men in the world started Microsoft," but since there is only one comma the appositve is "One of the richest men in the world."
Like going on a picnic, swimming, and If happy then celebrating elder sisters admission to college