Mary sue is making caramel ice cream. in the first part of the process, she combines a cup of sugar and a cup of water in a saucepan. she cooks the mixture over medium heat until the sugar melts and browns to a light amber color. then she adds the same amount of water to the mixture along with a cup and a half of cream and milk. which part of the preparation indicated a chemical change? a. adding cream and milk to the mixture b. mixing the sugar with water c. melting the sugar d. sugar changes from white to a light amber color