Which of the Following Statements Defines the Concept of "Discharge

Which of the following statements defines the concept of "discharge of contract"?

A) The parties describe their contract into a written document.
B) Neither party is held responsible for past actions, but both must perform the contract in the future.
C) A contract that is discharged for breach continues to exist for some purposes.
D) A contract is treated as if it never existed.
E) Each party provides a promise in order to create an enforceable agreement.