I have some alts that I have not unlocked additional bags for as of yet. I am wondering how the 6th bag would work on them? Does it...

A. Open up the 6th bag slot and that's all, leaving 4 and 5 greyed out.
B. Open up the 4th bag slot.
C. Open up all the bag slots to get to the 6th. So 4, 5 and 6 would be opened.
D. Not open up anything till the 4th and 5th bag slots are opened.

Thanks for looking at my question!