Otto inherited an old safe from his uncle. He did not have the combination and had no idea of the contents, if any. He sold the safe to his friend Frank "as is" for $50. When Frank managed to get the safe open, he found $25,000 in cash. Now Otto wants to rescind the contract claiming the doctrine of mistake applies. Which is correct? O Otto is wrong, because both parties knew they were ignorant about the contents of the safe and Otto bore the risk that the safe may have valuables in it.. O Otto is correct, there was mutual mistake because neither party knew of the money. O Otto is wrong, because rescission is only available when there is a unilateral mistake, and here both parties were mistaken. O Otto is correct, because it would be unfair to allow Frank to keep the money