Michael gets his head chopped off

In the final mission of Grand Theft Auto 5, you start off as Franklin, and you face quite a dilemma after the union Depository heist. The three main characters are at each other's throats and several people swoop in to take advantage of that. There's Steve Haines, the corrupt fib agent who wants Franklin to kill Trevor. And Devin Weston, the  billionaire who wants Franklin to kill Michael. Now, the obvious correct answer here is to pick option C. Don't kill either of them, as that leads to a finale so satisfying, if I were to remake top 10 best finales, I could almost guarantee it would be on the list. But that's obviously not what we're after.