Objection!
First of all because your position are all church doctrines and not based on "the word of God", since he never talked so specifically about marriage and single parents.
And even if, word of God is something selected by church doctrine even before a single soul could reach the Bible. So there is no way that someone who lves today could reach the original word.
Second, and most crucial, because you presented us four cases and not five as you say now!