Which religious institution banned trade with certain regions controlled by Muslims?

A. Greek Orthodox
B. Islamic caliphate
C. Papacy/Catholic Church
D. Buddhism

C. Papacy/Catholic Church

The religious institution that banned trade with certain regions controlled by Muslims is the C. Papacy/Catholic Church.

The religious institution that banned trade with certain regions controlled by Muslims was the Papacy/Catholic Church, which is represented by option C.

To arrive at this answer, you could approach it through a process of elimination by assessing the options provided:

A. Greek Orthodox: The Greek Orthodox Church is a Christian denomination, but there is no historical evidence to suggest that it banned trade with Muslim-controlled regions. Therefore, option A can be eliminated.

B. Islamic caliphate: The Islamic caliphate refers to the political and religious leadership in the Muslim world during specific historical periods. While Caliphates did exist and exerted control over various regions, there is no historical evidence to suggest that they banned trade with certain regions controlled by Muslims. Therefore, option B can be eliminated as well.

C. Papacy/Catholic Church: The Catholic Church, under the leadership of the papacy, played a significant role in European politics and trade during the medieval period. In response to the Crusades and conflicts between Christians and Muslims, there were instances where the Catholic Church called for the banning of trade with Muslim-controlled regions, such as during the time of the Crusades in the 11th to 13th centuries. Therefore, option C is the correct answer.

D. Buddhism: Buddhism is a religious tradition that originated in India and spread across various regions, but it did not hold political power or have institutions that engaged in trade in the same way as the Catholic Church or Islamic caliphates. Therefore, option D can be eliminated.

In conclusion, by eliminating the options that do not fit the historical context, you can determine that the Papacy/Catholic Church is the religious institution that banned trade with certain regions controlled by Muslims.