Please read the following excerpt from an essay, and answer the question that follows.

I've never actually met a real live humorist. Well, not in person at any rate. However, one summer, having
a lot of time on my hands, I discovered unexpected treasures lurking in the local public library. Among the
nuggets I unearthed in those musty stacks was a book by humorist Robert Benchley. To this day I
remember one of his quips. He wrote, "There are two kinds of people in this world; those who divide the
world into two kinds of people and those who don't." After laughing out loud, I became pensive. I
wondered why the quip was so funny. A year or so later, I formed a theory. Humor is based on the
unexpected.(br)In the passage above, the topic sentence and the thesis are one and the same.
In the paragraph about Robert Benchley, what types of evidence does the writer use to support his thesis,
other than narration?
A. Historical background
B. Comparison and contrast
C. Example
D. Classification

my answer is c.

Yes, I agree.

Your answer is incorrect. The correct answer is D. Classification. In the paragraph about Robert Benchley, the writer classifies people into two categories: those who divide the world into two kinds of people and those who don't. This classification supports the writer's thesis that humor is based on the unexpected.