How did attitudes toward Native Americans affect the development of industry in Washington? 1) American settlers refused to learn any Native American words, thus forcing tribes to adopt English as their main language. 2) European and American traders were reluctant to trade knives and other tools because they were worried that the Native Americans would use them as weapons. 3) Europeans and Americans resisted Native American methods of resource management and overhunted in the region. 4) Fur traders would deal only with European and American hunters because they thought their methods were more humane.