Environmentalists have raised concerns about the GreenTech Corporation, a leading solar panel manufacturer, because a significant portion of GreenTech's panels is produced in Region Y, where environmental regulations are often ignored. Nevertheless, GreenTech has implemented a verification program for its suppliers. They have employed a team of environmental auditors and compliance experts who examine the documentation of the materials sourced from Region Y's suppliers to confirm their compliance with regulations, conduct unannounced inspections to check records, and certify suppliers as approved sources of compliant materials. GreenTech exclusively uses materials from certified suppliers. Therefore, GreenTech's assertion that its materials from Region Y are sourced in compliance with regulations is warranted..

Which of the following, if true, would most weaken the justification for GreenTech's assertion?