1: they feared that they would get deported by the imgration officer. 2: they also feared that there family member(s) would get sent back 3: lots of people had different types of diseases and they thought they would catch them and get sick. 4: had fear of getting lost. 5: most of them didn't have family there so they were worried that they would have to live on streets or that they might jot get a job.
hope these were enough reasons. there r more reasons but these were the only ones i knew of so yea.
I would say the answer is A. D would be incorrect because constructing railroads is all over the country, not just in cities. B and C is wrong because you can't assume with the information given to you.
