I had a semester-long research project in college composition. The goal was to learn to write papers that were for a specific audience on a certain subject. If you pick something complicated to the teacher that they don't understand, your chances of getting a good grade (as long as you don't pull things out of your ass) go up substantially, I think. My teacher had other people in my school read my paper, but I came out of the class with a high A without much effort.
It's probably too late to be giving advice on the choice of your subject, but: pick something which arouses your interests. If you choose a dull subject, doing the project won't be any fun and you'll likely get a lower score!