A contract made while one of the parties was drunk may still be valid if

A being notarized does not necessarily affect the validity of a contract made while one party was drunk. B is incorrect because the consent of both parties is required for a contract to be valid, regardless of their knowledge of the other party's intoxication. D is incorrect because a contract can still be valid even if it is not notarized or affirmed by a sober party. Option C is correct because affirming the contract when sober shows that the party was still willing to uphold the terms of the contract even after their intoxication wore off. This can show that the party was able to understand and willingly enter into the contract while they were drunk, making it valid.