the crusades were military expeditions undertaken by\neuropean christians to regain the holy land from the…

the crusades were military expeditions undertaken by\neuropean christians to regain the holy land from the muslims.\nmuslim armies who sought to conquer christian europe.\nchristian and muslim armies who joined to fight the mongols.\neuropean christians who wanted to destroy constantinople.
Answer
Brief Explanations:
The Crusades were a series of religious - military campaigns initiated by European Christians. Their main goal was to recapture the Holy Land (especially Jerusalem) from Muslim control. The second option is incorrect as the Crusades were not launched by Muslim armies to conquer Europe. The third option is wrong because the Crusades had nothing to do with fighting the Mongols, and the two sides (Christians and Muslims) were in conflict, not alliance. The fourth option is incorrect as the goal of the Crusades was not to destroy Constantinople.
Answer:
A. European Christians to regain the Holy Land from the Muslims.