Answer:
B.Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria
Explanation:
The mention of the central powers was during the WW 1 which was mainly between the central powers and the Allies. This war started inform of minor war between Australia-Hungary and Serbia in 1914 which spring up into bigger war with 32 countries involved.
The Allies in the war include the Great Britain, France, Russia, Italy, United states and Serbia.
It must however be noted that the assassination of Archduke Ferdinand by a Serbian in 1914 serves as the genesis of the war.