Final answer:
American doctors may have been reluctant to admit that industrial poisoning was a problem for American workers due to potential influence from industries and a lack of awareness or understanding.
Step-by-step explanation:
This question is related to the subject of Social Studies and is suitable for High School level. The question is asking why American doctors might have been reluctant to admit that industrial poisoning was a problem for American workers.
One possible reason is that doctors may have been influenced by the interests of industries or corporations that were responsible for the poisoning. These industries may have had a significant economic and political influence, and doctors could have faced negative consequences or backlash if they spoke out against them.
Another reason could be a lack of awareness or understanding of the extent and impact of industrial poisoning on workers. Proper research and studies may not have been conducted, or the findings might have been suppressed or downplayed.