The answer I believe would be b
Answer:
i. The Delian League was formed. ii. The Peloponnesian War began. iii. A plague broke out in Athens. iv. Athens lost its ruler and its power.
The situation that caused stress on public services offered in American cities during the late 19th century and early 20th century was: Migration from farms to cities.
Migration from farms to cities massively increased the number of population that should be eligible to obtain government benefits in that area destination. This lead to an increase of work load for government workers in that period and caused stress on public services offered by the cities.
