Austria-Hungary had invaded and crossed over into, Serbia and Russia was in an alliance with Serbia, so they felt as though they had to help out. Hope this helps.
Answer:
Just because somebody is opposing to your vews doesn't mean you have to threaten them with violence. you first response to something should not be anger but a way to push your beliefs so others can learn and understand and not be harmed because your emeotions get the best of you.
Explanation:
In the court case "brown vs board of education", thurgood marshall and other colored people from the NAACP fought to desegregate schools. the winning of this case helped to end segregation and gave colored people the confidence to bring other cases to court.
hope this helps :)
I think it is number 3 set up a medical system.