Answer:
C) By the red crosses on their backs.
Explanation:
The crusades were a series of religious wars in Western Asia and Europe, supported and directed by the Roman Catholic Church between the XI and XVII century. Amongst the Western Christian military orders, there were the Knights Templar, one of the most wealthy, powerful and elite fighting force. They wore distinctive white mantles with a red cross, which was a symbol of martyrdom. They considered a great honor to die in combat, and thought is assured a place in heaven. One of the principles of their religious order was to never retreat from battle, unless being ordered by their commander, or if the Templar flag went down.