It's a total non-answer and you know it.
Tell me, should the last 12 verses of Mark be there or not? It's a simple Yes or No question, please answer.
Truth is, those who claim the word of God is preserved in all versions do not really believe it is preserved at all. It is you that cannot take any stand.
Take a stand, should the last 12 verses of Mark be there or not?
God inerrancy applied ONLY to the original manuscripts/books!
He has indeed preserved those into the original language texts that we today base English versions upon...
So we do indeed have infallible versions for us now, for though ALL of them still have some textual variant mistakes, scribal glossong errors, copying mistakes, still can be seen as infallible word of God!
the originals were perfect, NO translation is today!
And to your mark question...
Believe that he originally wrote the gospel with the shoertened ending, but early on, thescribes/copiers decided to "smooth it over" and incoprated the longer ending, as that longer ending was based upon known deeds/works of the Apsotles in time of acts!