As concerns grew about the number of immigrants coming into the United States, organizations were created to lobby against immigration. People in these organizations felt that the immigrants, especially Catholic immigrants, were a threat. This is because people believed that
A.
Catholic immigrants caused the country's problems.
B.
Catholicism would be good for the United States society.
C.
Protestantism was the only religion allowed in the US.
D.
Protestant immigrants needed jobs more than Catholics.