Which one of the following best summarizes the main idea of the passage? A. United States government policy toward Native Americans has tended to disregard their needs and consider instead the needs of non-Native American purchasers of land. B. In order to preserve the unique way of life on Native American reservations, use of Native American lands must be communal rather than individual. C. The Dawes Act's restriction on the right of Native Americans to sell their land may have been implemented primarily to serve the interests of politicians and bureaucrats. D. The clause restricting free alienability in the Dawes Act greatly expanded United States governmental activity in the area of land administration. E. Since passage of the Dawes Act in 1887, Native Americans have not been able to sell or transfer their former reservation land freely.