Option: A: The crusades increased the bitterness and mistrust between the people of the two faiths.
Explanation:
Pope Urban II gave a speech that called all the Christians to unite together and raise arms to fight the war against the Muslim. The first crusade reclaims the Holy Land and to protect the Christians from Muslim. Pope Urban II encourage kings, knights, and civilians to fight for Holy land in Jerusalem. The crusades between Christians and Muslims lasted for 500 years.
