At your company, when captains are downgraded back to FO status, how do they decide who gets to upgrade first when the music starts again?

In other words, if a senior FO bypasses upgrade, then the junior FO who did upgrade is downgraded, will the company:

Option A: Restore the downgraded CA first, before offering the senior FO a chance to upgrade

Option B: Put out a system-wide upgrade bid and upgrade in order of systemwide seniority without regard for previous status

Please reply with the name of your company and which one they use.

I was told that the "industry standard" was option B, and that is what the PSA MEC is saying. In our case the contract does not clearly say one way or another. There is certainly a discussion for why either case is better, but I'd really like to hear if any other companies have a clear method defined.