Which describes major facing the the builders of the transcontinental railroad a. spanning the grand canyon b. crossing the sierra nevada c. bridging the rio grande d. tunneling under lake erie ?

the government paid religious orders to provide basic education to native american children on reservations. in the late 19th and early 20th centuries, the bureau of indian affairs (bia) founded additional boarding schools based on the assimilation model of the off-reservation carlisle indian industrial school.

russia because it is the biggest state