D.
Do it in stages. My kids slept with us, not cuz I wanted them to, until, well my son was almost 2 mos and my daughter 3 mos. This is what I did. They become accustom to your smell and "night time noises, breathin ect". So set up the pack and play and once he's asleep in your bed move him to the pack and play. If he wakes move him back. After a few nights he'll stay in the pack and play all night. Then do the same thing moving him to his own room. It doesn't take that long, but it makes the transition much easier on both of you and you don't have to let him CIO, not that I'm against that. I've done that too. But this works, and I've mentioned it to loads of other moms. Oh, if you move him to his own room and he still wakes try leaving a shirt that you've worn all day in the crib with him. Then he can still smell you.