Imagine being given an ultimatum. What would you choose, the person who gave you the ultimatum or the other choice?
Personally I would never choose the person who gave me an ultimatum. It's unfair to give such stupid options when ultimatums are incredibly hard to choose. Whoever gave the ultimatum expected you to choose them which is why you should choose the opposite. Whoever gives an ultimatum simply doesn't care as much as they should. If they care about you, they wouldn't have gave you one in the first place and respected your opinion.