Answer:
C to give insight as to how Nixon truly feels about resigning
Explanation:
All through the article you can read how Nixon feels, and how others feel about what Nixon just did, as you can read in this excerpt:
"Mr. Nixon said he decided he must resign when he concluded that he no longer had "a strong enough political base in the Congress" to make it possible for him to complete his term of office. "
He is sad, and he seems like he had no other option but to resign from office, and the author of the article lets us see that, by quoting Nixon everytime that the time is given, and to put only those cites that would make him look closer to the people, and that lets us now that he is the victim and a patriot, and a hero by resigning that he is someone who sacrificed himself for he country´s well being, instead of this resignation being consequences of his own actions in the past.
