Here are the answers to your questions:
9. Why did most of the immigrants who came to America in the late 19th century settle in major cities?
C) Cities were the cheapest places to live and offered unskilled laborers steady jobs.
10. What did President Harrison designate as the official entry point for immigrants arriving to the east coast of the United States?
B) Ellis Island
11. Why did many people think that the building of the transcontinental railroads was a federal government project?
D) Railroad construction companies were heavily subsidized with money and land grants from the federal government.
12. Choose the THREE items that CORRECTLY describe an aspect of the building of the First Transcontinental Railroad.
A) It crossed the Rocky Mountains.
D) Large number of Irish immigrants were used in construction going westward.
F) The Central Pacific and Union Pacific railroads met at Promontory Point, Utah, completing the project.
If you have any more questions or need further clarification, feel free to ask!