Option: C. The Church wanted to share power with the emperor.
Explanation:
The Papal States attacked by the Lombards and Charlemagne was there to help recover it for Pope Leo III. Charlemagne called Charles I, became king of Frank and Lombards. Later, he has crowned the emperor of Rome in 800 A.D. He was known for his political capabilities and military skills. The Church shares its power with the Empire for its survival and safety from attacks from outsiders.