PLEASE HELP ASAP!

Why did the Balkans Get the nickname, the “power keg” of Europe?

A. Region was known for producing the finest flour and all of Europe.

B. There were several active volcanoes in the Balkans which could erupt at any moment.

C. Most of the arms and ammunition in Europe were manufactured in the Balkans.

D. The ethnic mix in the Balkans was like a keg of gun powder, and one spark could easily explode into a war that involved all of Europe.