Which of these events related to Christian crusades occurred last in 1261?

a.The childrens crusade resulted in the enslavement of thousands of children . .

b.French and Norman Nobles defeat the suljek turks and free the palestine from the muslims . .

c.The byzantines recaptured constanople and end the latin empire . .

d.Saladin conqueres the christian crusaders state of the middle east.