A Buyer and Seller Enter into an Agreement to Sell

Multiple Choice

A buyer and seller enter into an agreement to sell a mobile home and lot.Before the deed can be signed,the mobile home is destroyed by a tornado.Which of the following doctrines would most likely allow the buyer to avoid his contractual obligations?

A) Impossibility.
B) Commercial impracticability.
C) Frustration of purpose.
D) Failure of a condition precedent.
E) Novation.