C. The caste system is necessary to preserve social stability
"They were radical and ultra-democratic, and they completely supported the new republic and the abolition of the monarchy. The Montagnards were composed primarily of the Jacobins and the Cordeliers. The Jacobins, led by Maximilien de Robespierre, longed for a strong, centralized government with economic power."
Source: study.com
Hunting wild animals is what they did
Hospitals I believe. I have been taking a test on economics and had this as a question as well. I'm not so sure, but I do believe that the correct answer would be the third one, hospitals.
Hopefully i'm right, and we both get it right haha. And well I hope this helped.