Answer:
B. Disagreements about the use of unleavened bread and the power of the pope
Explanation:
The Great Schism took place in 1053, but the causes and disputes were older than a century.
The most important was the Bishop of Rome's claim of preeminence as the Pope. The Eastern Christians did not agree with that claim. Â
The Pope tried to force Greek Churches (Eastern or Orthodox Christians) to close or adapt to Latin practices. This caused a reaction from the Patriarch of Constantinople and the subsequent Schism. Â