Work on the transcontinental railroad began in 1863 how long did it take to finish it

During world war 2 mexican workers came to the united states as part of the

The holocaust of world war ii resulted in a) the nazis effectively used propaganda to gain and hold power in germany. b) ethnic regimes carried out mass devastation. c) deporting all european jews to the island of madagascar. d) the systematic mass slaughter of european jews and and others in nazi concentration camps during world war ii.

Which statement is the most accurately describes the reasons for the seven years war in north america