I'm pretty sure it would be B, because the tensions between most groups are mainly to do with religious differences, especially relating to the belief of how many gods exist.
If you are talking about them trying to expand in to present-day Canada, then it brought renewed conflict with Britain (war of 1812)
if it is towards the west, i guess it hampered technological development, because most people were moving west through the trails, instead of staying to help build up the economy
hope this helps
Answer: a. I, II, III, IV
Explanation:
The Boston strike of 1919 saw the Boston Police go on strike after their Police Commissioner Edwin Curtis, refused to deal with any form of union activity in the Boston police force.
As a result of the strike, there was violence in the city and Calvin Coolidge who was governor at the time, called in the National Guard. When order was restored, Edwin Curtis fired the AFL representatives and other striking officers and replaced them with new and better paid ones.
