i want to set up my webcam, but when i want to set it up, it says Option A, Option B and Option C. Is there a fix to that?

Check some of the other replies in this forum for this issue. It usually resolves itself after resetting your pc a couple times, unplugging and replugging random USB things, or running as administrator. There's no simple fix for this one, it kinda seems to fix itself and then the issue goes away forever lol. Sorry I can't be more help with this one

i use my laptop webcam, is that the problem?

No, laptop webcams should work fine. It's just the program being finnicky. Sorry I don't have an actual solution to this.