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?
Answer
A
Salt lowers the osmotic pressure of water, which makes the melted snow more likely to be absorbed into the ground before it freezes.
B
Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.
C
Salt raises the vapor pressure of water, which makes the melted snow more likely to evaporate before it freezes.
D
Salt raises the freezing point of water, which makes the melted snow on the road less likely to form ice.