ED I vs ED II

Hey so I was wondering what the difference was between ED I and ED II and if I could do both? SInce I would like to apply to Columbia ED and UChicago ED II. Could I still apply Early Action to Uchicago? Thanks

You have to pick one for UChicago, can’t do both.

ED I and ED II are timing – you wouldn’t pay to submit the ED II usually until you find out if your ED I school accepted you. If ED I accepts you, you must attend.