The correct option is C Hot water
Shellac is scraped from the bark of the trees where the female lac bug also known as Laccifer lacca, secretes it to form a tunnel-like tube as it traverses the branches of tree. The trees are cut, the lac separated by rollers, thrown into warm water and kneaded, forming the crude lac. After boiling in hot water, the lac is dried, put into bags, and held in front of a hot fire. The lac melts, drains out, and drops into a wet revolving wooden cylinder, forming flakes known as shellac.