Which were major causes of conflict between native americans and white settlers in the 1800s? choose *all* answers that are correct. a. the u. s. government violated many of the treaties it had negotiated with native american tribes. b. native americans were dissatisfied with their share of profits from the transcontinental railroad. c. gold miners, farmers, and cattle ranchers laid claim to native american lands. d. white politicians ignored the concerns of native american voters in their districts.