The key to the court's holding in favor of Spearin in the United States v. Spearin case is: Group of answer choices that the government was entitled to annul the contract that the contract's clauses required the contractor to visit the work site, check the plans, and to inform itself of the requirements of the work that the contract was ambiguous that if the contractor is required to build according to plans and specifications prepared by the owner, the contractor will not be responsible for the consequences of defects in the plans and specifications