What key factor does Technician B mention about anti-freeze effects?

The correct response highlights that anti-freeze is critical in influencing the freeze and boil points of engine coolant. This characteristic is vital because it allows the coolant to remain effective across a broad range of temperatures, preventing freezing in cold conditions and boiling in hot conditions. By adjusting these crucial temperatures, anti-freeze helps ensure that the engine operates efficiently and avoids damage due to extreme temperature fluctuations.

Understanding this function is essential for technicians, as it directly impacts engine performance and longevity. The properties of anti-freeze are designed to provide optimal protection against the adverse effects of temperature extremes, which is crucial for maintaining the integrity of an engine's cooling system throughout varying environmental conditions.