Which of the Following Is Enforceable Without Consideration

Multiple Choice

Which of the following is enforceable without consideration?

A) A new promise to pay a debt barred by the statute of limitations.
B) An illusory promise.
C) Under the common law,a promise made to satisfy a preexisting moral obligation.
D) A promise by a father to pay someone for rendering emergency services to his injured son before the father had arrived at the accident scene.