Germany, Italy, and Japan
Because it was one of the first events of the revolution and it resulted in unfair punishment, "The Boston Massacre" which in my opinion was the worst massacre of all time. Only 5 people dead
Here's a good video to help you out: https://www.youtube.com/watch?v=HlUiSBXQHCw
A paragraph would show my answers to explain
I think this question refers to the competition between European nations around 19th centuries, such as during the scramble for Africa (the colonisation of Africa by European colonies.
In order to increase their power during this competitions, the different, mostly European nations built new colonies - this is the correct answer.