Sam2 – I was thinking along those lines too, but it seemed too obvious, and after Happygirlygirl’s comment, I figured the answer must not be something obvious. Also, why would he ask the question if it’s obvious?
But, then again, just because it’s obvious to me, doesn’t mean it is to others, so you could be right.
I was thinking that maybe, like you said, the other guy figured out that the first guy was clearly planning to do split. If guy1 thought that he convinced guy2 to do split, there’s no reason for him to do take and split the money- if he’s going to split the money anyhow and he “knows” that guy2 is doing split, he may as well just do split, and even if he is worried that guy2 will do take after all, there still is no point in his doing take. If they both do take, no one gets the money, so he may as well do split. Therefore, the logical assumption is that guy1 will do split. If guy2 figured that out, he would do take, so he can get everything.
Mainly, I choose C because the answer is supposed to be surprising.