The large community of Christians across medieval Europe was known as

Explanation:

From the 11th to 13th centuries, Latin Christendom rose to the central role of the Western world. The term usually refers to the Middle Ages and to the Early Modern period during which the Christian world represented a geopolitical power that was juxtaposed with both the pagan and especially the Muslim world

vertical merger is the term used for the joining of two or more firms involved in different stages of producing the same good or services.

explanation:

answer; /// i do believe that the correct answer is (d) majority vote as an approval requirement;