What were the three estates in French history

The first estate were the clergy, they were the very rich and wealth and owned 10% of all French land as well as 0.5% of the French population. The second estate were the nobility they owned 30% of the land but only 1% of the population, they also did not have to pay taxes. The third estate was the rest of the population they owned little little land.

d. it gave farmers a way to organize for more political power

to protest slavery i would think it would be a