Arbitrator: The shipping manager admits that he decided to close the old facility on October 14 and to schedule the new facility' s opening for October 17, the following Monday. But he also claims that he is not responsible for the business that was lost due to the new facility' s failing to open as scheduled. He blames the contractor for not finishing on time, but he too, is to blame, for he was aware of the contractor' s typical delays and should have planned for this contingency. Which one of the following principles underlies the arbitrator's argument? ['A manager should take foreseeable problems into account when making decisions.', 'A manager should be held responsible for mistakes made by those whom the manager directly supervises.', "A manager, and only a manager, should be held responsible for a project's failure.", 'A manager should be able to depend on contractors to do their jobs promptly.']