The answer would be The business community Aggressively opposed the closed union shop
On its prime , the union had a staggering membership of 5 million members. On the 1920 , the union fell because of the reasons that you mentioned on from the B - D Options
Hope this helped you out
Independet city-states mostly developed because either:
a - some of the city-states were isolated because they were islands
This is a good reason why a city-state can develop - as it's physically siolated
c - the mountains separated groups of people from one another.
d - people also depended on navigable rivers for travel and communication
The last one perhaps applying a bit less.
Answer:
for. a successful Union military action.
Explanation: