Which One of the Following Does Not Terminate a Contract

Multiple Choice

Which one of the following does not terminate a contract?

A) The buyer and seller agree orally to cancel their contract when neither one has performed his obligations under it.
B) Minnie and Mickey agree that Minnie will take less than the amount Mickey owes, as full payment of the debt, and Mickey will pay her two days early.
C) Twain had contracted to build a model of a proposed building for architects who were to meet with their clients today, March 10. The model was destroyed last night when a car left the road and crashed into the workshop and destroyed the model.
D) Fred no longer wants to honour his contract to sell Mitra his printer but tells Mitra he'd substitute a $500 boat. Mitra agrees.
E) When Ben's new car is delivered, the seats are vinyl rather than cloth as ordered.