Which of the following best summarizes the reaction of native americans to the flow of pioneer settlers into the western united states? a. native americans often met the settlers’ wagon trains and traded with them. they attacked the pioneers only rarely. b. native americans were furious because of the wagon trains. they killed as many pioneers as they could. c. native american nations in the west allied and demanded large payments from the pioneers in exchange for letting them continue their journey west. d. native americans avoided the pioneers. they did not want to have any contact with them.