Answer:
It would be the first choice because when going up a scale you use ABCDEFG therefore when going down your Chromatic scale you would use GFEDCBA.
Explanation:
Tiles (vulcanized) are made of refractory metal oxides and semi-metallic oxides, through the process of grinding, mixing, pressing, glazing, sintering, and forming an acid-resistant porcelain or stone, Decorative materials.