Reasons for the 1920 stock market crash

All of the following were grievances against the king of england except:

According to us supporters, which was a benefit of purchasing alaska? the territory would be a buffer to invasions from europe. the territory would provide a place for many americans to live. it would increase trade by improving access to the northern pacific. it would increase the united states’ power by creating a bond with russia.

Which is the correct description of a revolution and one of its outcomes