Final answer:
The correct answer is option a) Simony.
Step-by-step explanation:
The medieval church abuse revealed in the scene with the Pope is simony, which is the selling of church offices. This practice was part of the wider issue of corruption within the medieval Church and was particularly addressed during the investiture controversy when Pope Gregory VII banned simony and excommunicated Holy Roman Emperor Henry IV for continuing this illicit practice.
This historic conflict marked a significant shift in power relations between the Church and secular rulers, showcasing the Church's efforts to reform and consolidate spiritual authority. Additionally, issues like nepotism and the moral behavior of clergy, including the enforcement of celibacy, were part of the broader push for Church reform.