Which of the following are accurate statements about how Europe changed as a result of Otto the Great's rule? Select the three correct answers.
(1 point)
1. Otto the Great strengthened the power of the German monarchy and ended the rule of regional dukes.
2. He expanded the territories of the Holy Roman Empire through successful military campaigns.
3. Otto the Great established close relationships with the Pope and worked to strengthen the influence of the Catholic Church.
4. He introduced a system of feudalism, decentralizing power and authority throughout the empire.
5. Otto the Great implemented policies promoting cultural and economic exchanges with neighboring regions.