Which of the following sentences is the thesis statement?
Select one:
a. I put a tremendous amount of time and effort into typing that paper, and I would appreciate it if you spent an equal amount of time and effort grading it.
b. If you understood how hard I worked on it, how much my friends liked it, and what a mistake you have made, then you would surely give me an "A."
c. After finishing my paper, I gave a copy to my friends to read. d. Please allow me the opportunity to argue for a better grade.