Question

in the 1800s, both \old\ and
ew\ immigrants to the united states faced hostility because of
limited housing availability
worries about overpopulation.
high us unemployment levels.
differences in culture and language.

Explanation:

In the 1800s, immigrants to the US had distinct cultures and languages compared to the existing population, leading to hostility. Housing, over - population and unemployment were not the main reasons for the hostility towards immigrants.

Answer:

D. differences in culture and language