Why does the production possibilities frontier bow out? Give an example of the two goods for which this would be the case? (At least 100 words)

1. regarding general guidelines for the preparation of successful soups, which of the following statements is true? a. thick soups made with starchy vegetables may thin during storage. b. soups should be seasoned throughout the cooking process. c. finish a cream soup well before serving it to moderate the flavor. d. consommés take quite a long time to cool.