I believe that God chose all of us - as he desires that all of us be saved. However, God has known from the foundation of the world who would answer the call (because He stands outside of time).
God has chosen individuals throughout history to serve certain roles in his salvation plan - but never out of merit, but out of grace. He chose Jacob rather than Esau. He chose Abraham to be the father of descendants who would be blessed. He chose Mary to be the mother of God - all from the foundation of the world. But each of us, with our own free will, either choose to respond to God’s call or not. Abraham is praised for his faith (a choice) which made him righteous - if God made him believe, that would not be faith.
I’m thankful for life (which God gave me as an act of grace) and for the opportunity of salvation (which is not merited, but an act of grace). I’m thankful that God chose to give His son for us, that through His sacrifice, we might be made righteous through acceptance of that sacrifice, and confession of, and repentance for, our sins and embrace faith in the God, in the form of the Father, the Son and the Holy Spirit.
Blessings,
Brian