Kiev controlled the large area between the baltic sea and the black sea, which made kiev what

What role did the alliance system play in preventing austria-hungary and serbia from coming to a compromise settlement?

What was one major cause of worldwide conflict during the first decade of the 21st century?

How does cooperative federalism work in the united states? a. state and federal governments have different and overlapping responsibilities b. branches of the federal government can check one another's power. c. when amending the constitution, citizens vote directly. d. bills passing the house of representatives must also pass the senate.