Answer:
The correct answer is letter "B": thirty days.
Explanation:
Anticipatory Breach or Repudiation is the notification one party in a contract lets the other party know that the obligations stipulated in the initial agreement will not be met.
According to the rules if the Uniform Commercial Code (UCC), if one of the parties has good enough reasons to believe that the other party is not going to fulfill its obligations in a contract, that party can request an "adequate assurance of performance". If the request is not answered after 30 days, the requesting party can assume the counterparty has repudiated the contract, thus, the requesting party can look for another provider to make a new agreement.