The right option is; C) color
Minerals are naturally formed crystalline solid that have a unique, and specific chemical composition. The chemical composition makes a mineral different from other minerals. The physical properties of minerals include color, hardness, crystal form, luster, streak, and cleavage. Color is the mineral property that is easily observed but can be unreliable when identifying minerals. The color of minerals have the tendency to change based on the chemical composition. Also, impurities can also influence the color of minerals.