Answer:
They were fighting over Jerusalem. They intended to recover Jerusalem and its surrounding area from Islamic rule.
Explanation:
The answer is the last choice, commonality.
The Central Powers included Austria-Hungary, Germany, and the Ottoman Empire.
The Central powers squared off against the Allied Powers during World War I. The Allied powers consisted of Russia, France, Great Britain, and Belgium. This war affected almost all of Europe and ended up with the Allied powers coming out victorious.