I believe that finding the balance of drones would be putting a limit on how many drones a country can use at one time. I'm not sure on the other 2 questions.
it didnt apply to border staates but the answer to your test question is A to free all free all slaves.
I"m not really sure but i think the answer is C.
Answer:
Ottoman Empire, empire created by Turkish tribes that grew to be one of the most powerful states in the world in the 15th and 16th centuries.
Explanation:
Hope this helps!