Answer:
They had to build a transcontinental railroad that would link the United States from east to west.
Explanation:
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Answer:
The Union Pacific and Central Pacific railroad companies built railroads to connect America from East to West. Both the companies under the Pacific Railroad Act began building the transcontinental railroad in America. The Central Pacific Railroad Company started building rail tracks in Sacramento and proceed to the Sierra Nevada. While, the Union Pacific Railroad Company, build in westward from the Missouri River.
