Bear for sure.
With a bear it'll either kill me and possibly eat most of me, or it won't. It won't torture me for days, or force me to perform sex acts or rape and then kill me. It might kill me slowly sure, I've read about what bears can do, but if it's doing that it's not for sexual gratification. It wouldn't kill me then do abhorrent things to my dead body just for its own kicks. It's just doing what's in its nature. Whereas a man could do so many unimaginable horrific things. NAMALT blah blah, but I've read enough about what some men's nature can be to want to take my chances with the bear. Yes the man could very well be a nice non-rapist sort of man, but I'd still rather be alone with a bear, because the chances are better.
I saw an interesting comment on Reddit about this, someone trying to explain to the men why women were answering this way. The thing was basically 'some of these MandMs are poisonous' man asked how could you tell which ones were ok. 'You don't, they all look exactly the same, you can't know which ones are poisonous til it's too late. That's what it's like for women encountering unknown males. So why choose to eat any of them?' I don't know if any of the baffled men got it in the end.