A. If you have enough bone present, you can possibly have dental implants placed into your jaw to house fixed teeth/crowns.
I need to make you aware though, that this can only be done if you have enough bone- and as it was 25 years ago since you had your teeth removed, you may need to have a bone grfat to bulk out your bone before hand
Alternatively, dentures are available that can be made in acrylic or even with a metal frame for extra stability.
Your regular dentist would be able to advise you better on what options you have.