School is CSCC. Beginning of quarter we were assigned groups for a project(I didnt like this to begin with) due at the end of quarter. Project was a walk in the park. I took the lead on it and assigned each person a different part. We were done in a few days. We agreed we would have 1 presenter(present to class). We get to the last class of the quarter and the other 2 groups decide each of their members would give their own portion. These guys were studdering sweating, just giving shitty presentations. Our presenter said he gives presentations all the time and felt comfortable doing it alone, great. 10 mins before its our turn, our group made up of young 20somethings gets nervous and also decides they want to each present their portion. Each presentation was suppose to be 15 mins, something I confirmed with the professor a few class's earlier. 3 hrs in and its not our turn yet. I finally tell him I have to go, I had other plans I wasnt going to miss. He was informed of how our group would be presenting 6 times throughout the quarter and there was no issue. He told me he would take it as a personal offense if I leave. So I left. I get my final grade and my leaving took my grade from an A to a final B. When I checked the other group members they all received A's. I did a majority of the project, organized everyone, did the portions of those students who dropped the class 1/2 way through and everything. He refuses to address this issue. Am I wrong here? I am pissed because my other classes were all A's and I just wanted to get the best grade I could.