B. Stick for putty, to the wallpaper sticker.
Many prefer to stick ceiling skirting boards directly on the wallpaper «Moment of the installation». Such glue holds everything perfectly. However, this method is fraught with a certain negative feature. If the wall has a curvature, then ugly cracks between the fillets and the wall may occur. They will again have to be covered with the same glue «Installation». Glue has white color, so everything looks decent enough.
