Petrochemical industry officials have said that the extreme pressure exerted on plant managers during the last five years to improve profits by cutting costs has done nothing to impair the industry's ability to operate safely. However, environmentalists contend that the recent rash of serious oil spills and accidents at petrochemical plants is traceable to cost-cutting measures. Which of the following, if true, would provide the strongest support for the position held by industry officials? ['There is evidence that the most damaging of the recent oil spills would have been prevented had cost-cutting measures not been instituted.', 'The petrochemical industry benefits if accidents do not occur, since accidents involve risk of employee injury as well as loss of equipment and product.', 'Despite major cutbacks in most other areas of operation, the petrochemical industry has devoted more of its resources to environmental and safety measures in the last five years than in the preceding five years.', 'Both the large fines and adverse publicity generated by the most recent oil spills have prompted the petrochemical industry to increase the resources devoted to oil-spill prevention.']