When making a Feldspathic crown, which component is most important for choosing the shade?

In feldspathic porcelain, FELDSPAR is the major component (~60-80%) and is responsible for: TRANSLUCENCY, SHADE/COLOR, and overall esthetic appearance of the ceramic. Feldspar provides the glassy matrix that gives porcelain its natural tooth-like appearance. QUARTZ adds strength and stability. LEUCITE CRYSTALS (added to some ceramics) enhance STRENGTH and THERMAL EXPANSION but do NOT determine shade. Therefore FELDSPAR is the component most important for shade selection. B is correct.