On June 1, a general contractor and a subcontractor entered into a contract under which the subcontractor agreed to deliver all of the steel joists that the general contractor required in the construction of a hospital building. The contract provided that delivery of the steel joists would begin on September Although the general contractor had no reason to doubt the subcontractor's ability to perform, the general contractor wanted to be sure that the subcontractor was on track for delivery in September. He therefore wrote a letter on July 1 to the subcontractor demanding that the subcontractor provide assurance of its ability to meet the September 1 deadline. The subcontractor refused to provide such assurance. The general contractor then immediately obtained the steel joists from another supplier. If the subcontractor sues the general contractor for breach of contract, is the subcontractor likely to prevail? No, because the subcontractor anticipatorily repudiated the contract when it failed to provide adequate assurance. No, because the contract failed to specify a definite quantity. Yes, because a demand for assurance constitutes a breach of contract when the contract does not expressly authorize a party to demand assurance. Yes, because the subcontractor's failure to provide assurance was not a repudiation since there were no reasonable grounds for the general contractor's insecurity