Barb Has Contracted to Build a Garage at Holly's House

Multiple Choice

Barb has contracted to build a garage at Holly's house for Holly's 2001 Chrysler PT Cruiser.Before Barb begins work on the garage,the city where Holly lives outlaws the possession and driving of cars.On what basis could Holly get out of the contract?

A) Frustration of purpose.
B) Commercial impracticability.
C) Contrary to public policy.
D) Past consideration.
E) Intervening illegality.