Answer:
1. The threat of cheap labor to American workers
2. An increase to crime and disease
3. The Ku Klux Klan
Step-by-step explanation:
I'm sure that my first two are correct (1. The threat of cheap labor to American workers 2. An increase to crime and disease) but I'm not sure on the last one (3. The Ku Klux Klan)
Hopefully this helps!! :33