Answer:
The correct answer is B. The issue that forced Pope Gregory IV to step down as pope was that the emperor had the power to appoint clergymen.
Explanation:
During his pontificate, he conducted disputes with Emperor Louis I the Pious and his sons Lothair I, Pepin and Louis the German over the primacy of power in the Frankish state. The Pope decided to support Lothair I to settle the conflict, which was badly received by the Franconian bishops. However, he felt he had the power to resolve the conflict and went on to negotiations, which ultimately failed. The deceived Gregory returned to Rome and it was only after the bloody resolution of the dispute between the brothers that the Church's relationship with the Franks was renewed.
