Answer: open new markets.
Explanation:
The greatest priority of western railroad development as illustrated above was to open new markets.
Connecting the coasts made exportation easier to the Eastern markets. The development of the railroad also brought about new economic opportunities and new territories were also easily accessible.
The Hagia Sophia is a domed monument built as a cathedral and is now a gallery in Istanbul, Turkey. Hagia Sophia means “holy wisdom’. It has two floors centered on a giant nave that has a great dome ceiling, alongside with smaller domes, towering above.
The "new immigrants" who immigrated to the United States after the Civil War primarily came from all of the following countries except "Poland", since the other three nations from the list were far more prominent.