The answer is D. elevation
Answer:
Because the persians were going to take over Ionia but then Greeks claimed the land so then they started fighting for it there was a total of 4 Major battles.
Explanation:
The First Crusade is initiated when Byzantine Emperor Alexius Comnenus requests help in reconquering from the Seljuk Turks the lost territory of Asia Minor . Pope Urban II at the Council of Clermont calls upon the princes of Christendom for an armed “pilgrimage” to recover Jerusalem from the Muslims.
Arms race hope that helped