Which of the Following Statements Is True

Which of the following statements is true?

A) Where a supervening event results in partial impossibility of performance, a court can award partial rescission of the contract for frustration.
B) Where a frustrating event takes place, a party who has already (partly) performed his obligations under the contract may elect to affirm the contract rather than allowing it to be discharged.
C) While a party cannot rely on an otherwise frustrating event because it is self-induced, the other contracting party can rely on that event as discharging the contract for frustration.