I think I am late to the good news. So as I've read, there could be four choices format.
That's the old news, format has been decided and approved few days ago. Here is the article with all you have to knowhttps://www.nba.com/article/2020/06/04/board-of-governors-approves-nba-return-official-release
So the number 3 format was the chosen one.
Great! Pelicans still have chance to go make in the playoffs.
Probably because he has gotten many times of suspension in anti-drugs.
Probably. 
I do remember though one part in Last Dance when Michael found something when he entered the room of his teammates back when he was still young. Looks like this is normal for them when no test for recreational drugs will happen.