My first day of college was a disaster. First, I went to the wrong classroom for math. I was sitting in the class, surrounded by people taking notes and paying attention to how to do equations, which would have been okay if I was supposed to be in an algebra class. In reality, I was supposed to be in geometry, and when I discovered my error, I had already missed the first twenty minutes of a one-hour class. When I got to the correct class, all twenty-five students turned and looked at me as the teacher said,
“You’re late.” That would have been bad enough, but in my next class my history teacher spoke so fast I could not follow most of what he said. The only thing I did hear was that we were having a quiz tomorrow over today’s lecture. My day seemed to be going better during botany class, that is, until we visited the lab. I had a sneezing fit because of one of the plants in the lab and had to leave the room. When I finally finished my classes for the day, I discovered I had locked my keys in the car and had to wait for my brother to bring another set. My first day of school was so bad that I know the rest will have to be better.

"My first day of school was so bad that I know the rest will have to be better." What function does this sentence serve in the paragraph as a whole?

A) It serves to give an example to support the thesis.
B) It serves to state the thesis.
C) It serves to counter an argument related to the thesis.
D) It serves to conclude the paragraph.