Which of the following is true about the transcontinental railroad?

A. Many Immigrants Were Responsible For Building This Project

B. This Railroad Connected The Easter And Western United States

C. A Journey From East To West Was Shortened From 6 Months To 6 Days With The Use Of This Railroad

D. Many Workers Died While Building The Railroad Due To Explosions, Rock Slides, Or Conflict With Native Americans

E. All Of The Above