Select the three reasons that people joined the crusades.
riches
gain control of the holy land from muslim control
find new trade routes
adventure
political freedom

1) riches - yes, this is correct!
2) gain control of the Holy Land from Muslim control - this was the "real", official reason, what people openly admitted

and I think that the third one will be adventure, as neither trade routes nor political freedom played a role in the Crusades.