Explanation:

- In contract law, money won from a wager cannot be claimed through the courts because wagering agreements are void (not enforceable).

- If someone promises to pay stake money already won on a bet, this new promise is based on a void agreement.

- A valid agreement is enforceable by law, which is not the case here.

- A voidable contract can be canceled at the option of one party, but that's not relevant here.

- A contingent contract depends on a future uncertain event, but this is not so here either.

Correct Answer: Option 2 – Void