"what induced [american] indians to go out of their way to trap beaver and trade the skins for glass beads, mirrors, copper kettles, and other recent scholarship on [american] indians’ motives in this earliest stage of the trade indicates that they regarded such objects as the equivalents of the quartz, mica, shell, and other sacred substances that had formed the heart of long-distance exchange in north america for while northeastern [american] indians recognized europeans as different from themselves, they interacted with them and their materials in ways that were consistent with their own customs and beliefs." neal salisbury, historian, "the indians’ old world: native americans and the coming of europeans," 1996 a direct result of european exploration of north america and the coming of europeans," 1996 which types of evidence would best support the argument in the excerpt?