Answer:
c. Because X's failure to disclose the condition of the faucet is not material.
Explanation:
In order to consider X's failure as material and therefore allowing Y to rescind the contract, the failure to disclose must involve an element of the contract that is in such a bad condition that it would make the contract as "irreparably broken".
In this case, contract law provides other remedies that Y can use to try to make X pay for the repairs, but Y cannot unilaterally rescind the contract.