Answer:
The correct answers are B, C, and D. Crusaders joined the fight to gain political advancement, wealth and for a matter of religious self-determination.
Explanation:
The crusades were the religiously inspired, military ventures that Western Christians undertook between 1096 and 1271 for the conquest and preservation of Christian holy places in Palestine. It is an early example of the European expansion movement that started after the invasion of Europe by Vikings, Moors and Asian steppe peoples (the Huns) came to an end in the tenth century. The warlords who previously opposed each other and the population were now brought together by the conviction that the holy places in the Holy Land that were considered legitimate property by Christianity had to be freed from the Muslim rulers they had conquered since 638. Crusades also took place on the Iberian Peninsula as part of the reconquista.
