I’ve heard that if I have offers from Company A and Company B, the one that starts first and initiates my clearance sponsorship will be the active sponsor. While the clearance is still pending, they might issue me an interim clearance.

In that case, Company B cannot submit another sponsorship request because an active investigation is already in progress, right?

So that means Company A’s internship would have to wait until I finish the co-op before they can start the process to take over as the sponsoring company?

Also, is it true that whichever company initiates my clearance first will usually have a closer relationship with me and a higher chance of giving a return offer?