A. French aristocrats belonged to the second estate
D. it was very difficult to change membership in a estate
During the periods that were characterized by feudalism, the clergy was regarded as the first estate, the aristocrats were the second estate, while those that were commoners or peasants were third estate.
No social mobility existed among these estates. So it was difficult to change membership.
The Treaty of Paris of 1763 resulted in France forfeiting most of their north american land. They gave all their land to the east of the Mississippi river over to British rule within the British colonies.
