"Can you raise my grade? You gave me <grade lower than what I need>, but I really would rather have <grade I need>. So could you just change it?"
No, no, no. I will not change your grade because you need to pass this course, I will not change your grade because some other course requires a higher grade than what you got as a prerequisite, I will not change your grade because it will make you cry if I don't, I will not change your grade because if I don't you'll have to retake the course and pay tuition again. I will change your grade if we actually fucked up our evaluation of your work, but you've got to prove that we did.
Fucking students.