Which of the Following Statements Is TRUE

Which of the following statements is TRUE?

A) The doctrine of frustration applies only if the circumstances have changed so that performance,as originally intended,has become impossible.
B) Because of its effect upon the parties,bankruptcy always leads to frustration of a contract.
C) The doctrine of waiver may apply in connection with a condition,but not a warranty or an innominate term.
D) Bankruptcy always discharges a person from performing a contractual obligation.
E) Limitation periods exist,in part,because it is undesirable for courts to rely upon evidence that is old and perhaps unreliable.