Did you have any complications with your daughter? My youngest broth was 10 8 and they didn't even suggest a c-section and the one before him was almost 10lbs.
Tell him no and that you want to try vaginal first. My biggest baby was 10lbs 15ozs and I had him with no problems, didn't even tear. There's no reason to jump to c section over the weight of a baby unless there has been prior complications.