Foreordination - based on choices in premortal or in mortal life?

I am slightly confused about foreordination. What I thought I had understood was that foreordination is happening in the premortal life retro-causally because of the faith and good choices in this life. That's how I used to understand Alma 13, since it talks about how the foreordination happens due to the foreknowledge of God and their faith and good works (which I assumed means in this life due to the close proximity of mentioning foreknowledge??). This all makes sense for me considering God's foreknowledge of our mortal life and our ignorance of the premortal due to the veil. It is in line with what I think to understand from D&C, that the elect are elect because they don't harden their hearts, not that they don't harden their hearts because they are elect. However when I look up foreordination on the church website, I am lead to understood a foreordination is result of faith and good choices in premortal life. Which has me scratching my head because Alma 13:5 explicitely calls out choices that would be made. So, which is it? Maybe both?