Question

How did Otto I become powerful? by choosing the next pope by conquering vast areas of land by appointing supportive bishops by being crowned Roman emperor

Answer 1

Otto I became powerful by appointing supportive bishops.
If it hadn't been for these bishops he appointed who supported him, Otto I would never have become so powerful. 

Answer 2

Answer

by appointing supportive bishops

Explanation

Otto was a holy Emperor who was the most powerful western European ruler after Charlemagne. He organized a strong German state and expanded his authority over Burgundy and Italy.He is best known for transforming the Roman Catholic in Germany for the purpose of strengthening royal authority and subjected its clergy to his personal control.Otto became very powerful when he appointed supportive bishops. This is because they supported him.