The policy pursued toward the Indians has resulted favorably...many tribes of Indians have been induced to settle upon reservations, to cultivate the soil, to perform productive labor of various kinds, and to partially accept civilization. They are being cared for in such a way, it is hoped, as to induce those still pursuing their old habits of life to embrace the only opportunity which is left them to avoid extermination.

—Ulysses S. Grant, 1871

Which idea is being expressed in this quotation from President Grant?
A.
the assimilation of Native Americans
B.
the work of the Catholic missionaries
C.
the end of the Plains Wars
D.
the creation of the reservation system