played a significant role in the construction of the Central Pacific (West to East) track of the Transcontinental Railroad, while _______________ played a significant role in the construction of the Union Pacific (East to West) track. (1 point) Responses Japanese Immigrants, Chinese Immigrants Japanese Immigrants, Chinese Immigrants Irish Immigrants, Eastern European Immigrants Irish Immigrants, Eastern European Immigrants Chinese Immigrants, Irish Immigrants Chinese Immigrants, Irish Immigrants Native Americans, Chinese Immigrants

Chinese Immigrants, Irish Immigrants

Chinese immigrants played a significant role in the construction of the Central Pacific (West to East) track of the Transcontinental Railroad, while Irish immigrants played a significant role in the construction of the Union Pacific (East to West) track.

To determine the correct answer, we need to understand the history of the construction of the Central Pacific and Union Pacific tracks of the Transcontinental Railroad.

The construction of the Central Pacific track began in Sacramento, California, and extended eastward. The company responsible for its construction was formed by a group of Sacramento merchants, known as the "Big Four." This group included Leland Stanford, Collis P. Huntington, Mark Hopkins, and Charles Crocker.

The construction of the Union Pacific track started in Omaha, Nebraska, and proceeded westward. It involved the Union Pacific Railroad Company, which was led by Grenville Dodge, an American civil engineer and politician.

Now, let's analyze the options:

- Japanese Immigrants, Chinese Immigrants: While Chinese immigrants did play a significant role in the construction of the Central Pacific track, there is no mention of Japanese immigrants being involved.
- Irish Immigrants, Eastern European Immigrants: There is no historical evidence to suggest that either Irish or Eastern European immigrants played a significant role in the construction of the Central Pacific or Union Pacific tracks.
- Chinese Immigrants, Irish Immigrants: Chinese immigrants did indeed play a significant role in the construction of the Central Pacific track. However, there is no historical evidence to suggest that Irish immigrants played a significant role in the construction of the Union Pacific track.
- Native Americans, Chinese Immigrants: Native Americans were not involved in the construction of either the Central Pacific or Union Pacific tracks. However, as previously mentioned, Chinese immigrants did play a significant role in the construction of the Central Pacific track.

Based on the explanations provided, the correct answer is:
- Japanese Immigrants, Chinese Immigrants (0 points)
- Irish Immigrants, Eastern European Immigrants (0 points)
- Chinese Immigrants, Irish Immigrants (1 point)
- Native Americans, Chinese Immigrants (0 points)

Therefore, the answer is "Chinese Immigrants, Irish Immigrants."