Which denomination is the true Church that Christ founded? (Or do you reduce the Church to the mere "set of all believers", or if not, do you teach that the gates of hell prevailed over the Church Christ founded?)
-A8
It will not be any church that claims Mary is the co-redemptrix.
Read the early Fathers. It doesn’t show up anyplace. (It doesn’t really show up until recently)
Therefore, any denomination that comes to that conclusion cannot be His Church.