A: Well....not so much an A as it is an attempted A. I can't remember too well.
If memory serves, Luke was going to Dagobah to find materials for further instruction (such as a journal or a holocron.) What he did find is that Yoda's hut was completely overtaken by the tree. Also he found a device used in slave circuits to call one's ship if needed.
If I'm wrong, let me know.