When Martin, Frost, and O'Neill reviewed 30 years' worth of organizational culture research, they concluded that the link between ''strong'' integrated culture and organizational performance was _________________. Group of answer choices At best, unproven Well-established in the business literature, but inapplicable to intelligence organizations Supported by several existing longitudinal, well controlled studies, with in-depth generalist measures of culture across time The basis for pre-9/11 intelligence failures