How did immigrants attempt to adapt to their new lives in america?

United states mexico mexico 1860 in the shaded areas on these maps, which of the following groups most likely gained political power as a result of the boundary change between 1830 and 1860? a. american indian tribes living in what is now new mexico b. ranch owners from northern mexico c. catholic priests from spain with active missions in mexico d. people from the eastern united states who wished to develop settlements in more western american territories.