18. Which of the following situations will not result in a finding that voluntary consent is lacking for a valid contract? A. Commercial Impracticability B. Bilateral Mistake of Fact C. Undue Influence D. Duress 19. Which of the following statements best describes a novation? A. A novation occurs when the parties agree to mutually rescind their contract because of commercial frustration of purpose. B. A novation occurs when the parties agree to accept performance that is different from the performance originally promised because of commercial frustration of purpose. C. A novation occurs when the parties to a contract agree to substitute a third party for one of the original parties. D. Novations are illegal because they result from undue influence. 20. Which of the following statements best describes a third-party beneficiary to a contract? The law requires that only the parties to a contract benefit from the contract. A B. A non-party to a contract may enforce the contract, but the non-party must be a spouse or an adult child of a party to the contract. Any person who in any way benefits from a contract may sue to enforce the contract. C. D. An intended beneficiary is a third party for whom the contract was formed.