Answer :
B. and D.
Immigrants were mainly used to work in factories in terrible conditions for low-wages because they had no skill and since they had no language skills this is all that they could do - manual labor
And since they were running from their countries due to poverty, most of them could not afford best travelling conditions since they did not have enough money. Not to mention that many of them were illegaly travelling, hidden in the lower parts of the ship.
Immigrants were mainly used to work in factories in terrible conditions for low-wages because they had no skill and since they had no language skills this is all that they could do - manual labor
And since they were running from their countries due to poverty, most of them could not afford best travelling conditions since they did not have enough money. Not to mention that many of them were illegaly travelling, hidden in the lower parts of the ship.