Gelatin is used as an ingredient in the manufacturing of ice-cream because:

• Gelatin obtained from collagen and used as a food ingredient. Its role is to reduce crystallization by absorbing free water from the ice cream and preventing the growth of big crystals, giving the ice cream a thick, dense and less watery flavor. This implies that gelation helps to maintain the texture of ice-cream and keep it fresh for a long time.

Hence the correct option is (C).