Reflect on what you have learned about Westward Expansion in the United States. Think about the territories acquired, the trails west, the immigrant groups, and the Transcontinental Railroad. What role did each of these play in the fulfillment of Manifest Destiny (the belief that the United States was destined to expand from the Atlantic to the Pacific Ocean)?

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The acquiring of the territories gave the United States justification to send out immigrants into those territories and settle the land along the trails created by traders and trappers beforehand. These immigrants and other workers then set up the Transcontinental Railroad to facilitate trade and transport back and forth from the west coast to the east.

the answer is b.2008 and 2012 were presidential election years.