I would say a good answer for this would be your third option, which states, "You could hollow out a log near bees, and they would make it their home."
Let me explain why.
The problem here is the fact that the bees would be difficult to find without some wandering and luck, though the lucky explorer could walk away with quite a wonderful treat. Now, the last option presents a reasonable solution to this issue.
It states that you could hollow out a log near where the bees live, giving them the ability to make the log their home. That way, you would be able to, as it states, "keep" bees. It would prevent you from having to find them by random chance, as you would already know where they are.
I hope this answers your question!