Adrienne signed a written contract to sell a piece of real estate to Rich. However Adrienne died before the sale was completed. Adrienne's surviving spouse (her widow and heir) is responsible for Adrienne's estate (i.e., handling her affairs), and he does not want to go through with the contract to sell the real estate to Rich. What is the likely result? A. Adrienne's spouse can choose to enforce or rescind (avoid) the contract. B. The contract will be discharged. C. Performance will be excused because it is impossible. D. Rich can enforce the contract against Adrienne's estate.