<p>My advice is to not really expect a reply. I would be surprised if the professor responds unless you have a very good reason why you should have gotten an A. He/she probably sees a dozen similar emails after each semester, all thinking they deserved better. Consider that with the exam being 12% of your final grade, an 8% swing on the exam could give you a 1% swing in you final grade. You wouldn’t have to tank that exam or do significantly worse than your friend, just several percent worse. Unless you have some real sense that you got short handed, I wouldn’t even bother.</p>