Final answer:
Mrs. Mulligan should reduce her intake of sodas and increase her intake of calcium phosphates in the foods she eats to prevent tooth decay caused by the sugar in sodas.
Step-by-step explanation:
The dentist suggests that Mrs. Mulligan reduce her intake of sodas and increase her intake of calcium phosphates in the foods she eats because sodas contain lots of sugar that can dissolve the calcium phosphate in bone and teeth.
Sugary drinks like sodas can contribute to tooth decay by providing an acidic environment in the mouth. The acid can dissolve the calcium phosphate in the teeth, making them weaker and more prone to cavities.
Increasing calcium phosphates in the diet, such as through foods like dairy products, can help strengthen teeth and prevent the harmful effects of sodas.