A student lives in a place that receives lots of snow and ice during the winter. The student has observed that the highway department spreads salt on the road after a snowfall. Which of the following correctly explains why the highway department uses salt on the roads?

Dissolved salt lowers water’s freezing point. As a result, salty water on the road can remain liquid at temperatures where fresh water would freeze, making the melted snow less likely to form ice. Salt does not raise the freezing point, as choice B claims.

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