A. Central Powers was made up of Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria.
The Central Powers was a military alliance formed during World War I, which lasted from 1914 to 1918. The alliance was led by Germany and Austria-Hungary, with the Ottoman Empire and Bulgaria also joining in later stages of the war.
The Central Powers alliance was formed as a response to the formation of the Allied Powers, which included countries such as France, Russia, and the United Kingdom. The Central Powers believed that the Allied Powers were a threat to their interests and security, and they sought to counteract this by forming their own military alliance.