Explanation:

• Some graphite forms from the metamorphism of coal seams. The organic material in coal is composed mainly of carbon, oxygen, hydrogen, nitrogen, and sulfur. The heat of metamorphism destroys the organic molecules of coal, volatilizing the oxygen, hydrogen, nitrogen, and sulfur.
• A sedimentary rock consisting mostly of the mineral gypsum is likely to be an evaporite, i.e. a chemical precipitate crystallized from an ancient sea that dried up under an arid climate. Hence both statements are correct.