To prevent water in an engine's cooling system from freezing, antifreeze is used as an additive in automotive fluids. The added antifreeze lowers the freezing point of water. Dyes are also added to antifreeze. Why?

• A. to identify leaks in the engine's cooling system
• B. for aesthetic purposes only
• C. to decrease the freezing point of water furthermore
• D. to balance the effect of the added antifreeze

Answer: (A)