In order to make a QSub Election, I want to confirm what means qualified domestic corporation.

Does qualified domestic corporation means qualified domestic C Corporation only or can it be a qualified S Corporation as well?

Can I create two companies, one as LLC Holding and another as LLC Subsidiary (100% owned by the Holding LLC), and then request S Corp Status for both LLCs and also make a QSub Election for the Subsidiary?

Who must sign the QSub Election Form owned 100% by the Holding Company?