1. What part of the United States saw the greatest expansion in rail lines by 1890?

A: The West saw the greatest expansion in rail lines by 1890.

Yes.

To find the answer to this question, you can research the historical expansion of rail lines in the United States. Here are some steps you can follow to find this information:

1. Start by searching for historical maps or documents that show the expansion of rail lines in the United States during the late 19th century.

2. Look for maps or data specifically from the year 1890 or around that time period. These sources are more likely to provide accurate information about the expansion of rail lines.

3. Compare the expansion of rail lines in different regions of the United States. Look for areas that experienced significant growth and expansion of rail networks.

4. Pay attention to areas in the western part of the United States. The west was known for its rapid expansion in rail lines during this time period.

5. Take note of any specific states or cities in the West that had a particularly large increase in rail lines. This will help you pinpoint the exact location of the greatest expansion.

Once you have completed these steps, you should be able to determine that the West saw the greatest expansion in rail lines by 1890.