Objective: What adhesive metal should you use when soldering glass?

Which of the following solutions is more sound in terms of naive physics reasoning?

Possible answers: A). Solder won't stick to glass by itself--you need another metal on the surface to hold it in. Adhesive copper foil will wrap around the edge of the glass you want to solder.; B). Solder won't stick to glass by itself--you need another metal on the surface to hold it in. Adhesive rubber foil will wrap around the edge of the glass you want to solder.;
A).