Answer: B
Explanation: The Age of Faith, also known as the Medieval period, was a time in European history when Christianity was the dominant religion. This period was characterized by the rise of the Catholic Church and the growth of monasticism.
During this time, several important figures played significant roles in shaping the religious and cultural landscape of Europe. For example, Pope Leo IX was a prominent leader of the Catholic Church who played a key role in the Investiture Controversy, which was a political and religious conflict between the papacy and the Holy Roman Empire. Pope Gregory VII was another influential leader of the Catholic Church who played a key role in the development of papal power and the establishment of the papal states.
However, Genghis Khan was not a significant figure during the Age of Faith. He was a Mongol ruler who lived in the 12th and 13th centuries, and he is known for his military conquests and the establishment of the Mongol Empire. Genghis Khan had no role in the religious or cultural developments of the Age of Faith in Europe, so the correct answer is B. Genghis Khan.