The Western Church claimed authority over the Eastern Church because the Pope wanted the Eastern Church to remain Christian wanted the Eastern Church to move to Rome believed he had power over both churches. believed he had power over European kings

## Step 1<br />The question is about the historical conflict between the Western Church and the Eastern Church, specifically the claim of authority by the Pope over the Eastern Church. This conflict is known as the East-West Schism or the Great Schism, which occurred in 1054 AD. This schism was the result of theological and political differences that had developed over the centuries between the Eastern (Byzantine) and Western (Roman) branches of Christianity.<br /><br />## Step 2<br />The Pope, as the head of the Western Church, claimed authority over all Christians, including those in the Eastern Church. This claim was based on the belief that the Pope, as the successor of Saint Peter, held a primacy over all other bishops and thus had authority over the Eastern Church as well.<br /><br />## Step 3<br />The other options provided in the question are not accurate in the context of the historical claims of the Pope over the Eastern Church. The Pope's desire for the Eastern Church to remain Christian or to move to Rome is not directly related to the claim of authority. The Pope's belief in having power over European kings is a separate issue and not directly related to the claim over the Eastern Church.