Russ buys ranchland from Sam, a rancher, who claims that it would be a prime site for housing. Russ later learns that the law does not permit the land to be used for housing. Russ may

A. not rescind the contract.

B. rescind the contract only if Russ did not truly know the law.

C.rescind the contract only if San knew about the law.

D.rescind the contract only if the law is not common knowledge.