Was the "spark" that set off the underlying issues of main (militarism, alliances, imperialism, and nationalism) into a full blown war.
question 5 options:

britain defeating the boers

france retook the suez canal from egypt

the russian czar died without an heir to the throne

the austrian heir to the throne was assassinated by a serbian nationalist

By the end of the 1800s, there was a change in the nature of the immigrants coming to the united states. immigration from northern europe—england, ireland, germany, and scandinavia—declined, while immigration from italy, russia, and austria-hungary grew. in fact, between 1900 and 1910, more than three-fourths of all immigrants came from these three countries. unfortunately, these countries were far removed england, the home of our founders, and the immigrants who came from them had a hard time adjusting to life in their new country.

As the result of a conflict between british troops and a colonial militia in massachusetts

Brainliesttt !me : ) -what is invisible warfare?