During a lesson in physical science about changes of matter, students made ice cream. among the materials that are required to make ice cream is salt. which answer choice best explains the role of salt in this activity? adding salt to ice lowers the freezing temperature. this helps the milk mixture to freeze sooner because the mixture will reach the freezing temperature sooner. adding salt to the ice raises the freezing temperature. this helps the milk mixture to delay in freezing, giving the ice cream enough time to form and have a great taste. adding salt prevents the milk in the ice cream from going bad and giving the ice cream a bad taste. salt in ice cream preparation is used as a preservative to enable the ice cream to have a longer shelf life.