Answer:
The correct answer is
"The purpose of this excerpt is to help readers understand the immigrants’ struggle to make a living."
In the excerpt there are some cues to determine that immigrants faced a difficult financial time. The passage starts by mentioning that all immigrants were poor. Then, it adds that it was diffucult to get the money for a passage to America and how some of them arrived with no money.
So, based on the hints in the paragraph, we can infer that its purpose is to show the struggle of immigrants to make a living.