If a Buyer Becomes Concerned That the Seller May Not

If a buyer becomes concerned that the seller may not be able to perform required contract obligations:

A) he may not assign his contract rights under the contract.
B) he may demand assurance from the other party that the contract will be performed.
C) he may refuse to perform the contract under the doctrine of commercial impracticability.
D) he may be excused from performance under the doctrine of impossibility.