BLAW PLEASE HELP!!

Joshua is a contractor that agrees to build a new commercial office building in downtown Santa Barbara. He begins construction on the building but quickly discovers that he did not purchase the correct amount of steel or aluminum to complete the project. Joshua asks the owners of the building for more money to cover these additional costs, but the building owners refuse. As a result, Joshua stops working, having only completed 30% of the building. If the owners of the building sue Joshua, what is their best argument? That Joshua is in breach for part performance under the deal That Joshua is in breach for not purchasing the correct amount of materials before the deal was signed That Joshua is in breach for poor performance under the deal That Joshua is in breach for substantial performance under the deal