What is a solvent? O a relative quantity of molecules in a given space
O a different concentration of solute in a solution
O a substance that is dissolved in a solution
O a substance that dissolves a solute

The last one

Explanation:

A solvent is a substance that dissolves a solute

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.

the match lol