But what did the other students the class do? If almost everyone in the class did only one, the professor would have to give almost the entire class 33% for a mistake he made.
Looking back, I should have asked around. The job scheduler was one of several options so not everybody picked it. Still, somebody else must have.
The professor actually did relent and gave me a good (not perfect, but good) grade. Then he judged me extremely harshly on the final exam so I ended up with a B in the course anyway.