Answer:
C) This is Twain's thesis and serves to introduce all claims that follow.
Explanation:
According to a different source, the sentence this question refers to is:
"Perhaps the most celebrated turning-point recorded in history was the crossing of the Rubicon."
This sentence comes from the essay "The Turning Point in My Life." This is an essay by Mark Twain in which he discusses the importance of "turning points." These are moments in a person's life in which everything changes. In this essay, his main purpose is that of comparing his own turning points to the crossing of the Rubicon by Caesar, and thus develop the main idea of the essay.
