Why were the Crusaders so successful in the first Crusade?

AThe Crusaders were well equipped with weapons such as the crossbow and catapults.
CThe Turks were surprised and ambushed in a sneak attack by the Crusaders.
BThe Turks were already weak from fighting themselves.
DThe Crusaders were better prepared for the hot weather and had an abundance of food and water supplies.

Verified Answer :

Neuron

The reason why the Crusaders were so successful in the first Crusade was that the Turks were already weak from fighting themselves - B.

Contrary to common thought, at the times there was no single unified muslim resistance that was fighting the Crausaders, at least in the beginning. There were a lot of fractions that were fighting between themselves and against the Crusaders.