I need help answering this question

Which of following would be considered an example of a n enforceable contract? 0 Tim owes Peter money, but the statute of limitations has run out. 0 Tom owes Peters money, but before the statute of limitations ends, Tom is declared bankrupt. 0 Nancy agrees to buy her 15-year-old neighbor's car for $10,000. Tom owes Peter money, but Pete has waited too long to collect it and the statute of limitations has run out; however, Tom promises to repay half the amount anyway