Option #4 - This reads like Mr. Munroe is setting things up for another entertaining article/video/book topic.
The energies required to move the moon closer to the Earth would be staggering. Then there’s the gravitational impact to consider, and how fast it would need to be moving to keep a stable low-earth orbit; assuming that’s what we’re aiming for as a rendezvous. My guess is that, combined, this is close and fast enough to create mile-high tsunamis every day (maybe even all day), all over the planet. Meanwhile, our astronauts would be on the lunar surface watching the destruction from safety.