Which are socioeconomic consequences of immigration?

i. an increase in skilled labor forces wages down.
ii. an increase in indigent people puts a strain on resources.
iii. an increase in elderly workers increases social security costs.
iv. an increase in workers provides additional economic growth.

options:
1. i and ii
2. i and iii
3. ii and iii
4. ii and iv
5. iii and iv