The addition of 15 g of salt to a sample of pure water causes its freezing point to be reduced by 1.3°C. What would be the effect of dissolving an additional 15 g of salt into the solution? A. There would be no additional effect on the freezing point. B. The freezing point would be depressed (decreased) by an additional 1.3°C. C. The freezing point would be depressed by 15°C. D. The freezing point would become higher.