The process of crossing over, where parts of paired chromosomes are exchanged, usually _. increases the number of genetic combinations in a population

decreases the number of genetic combinations in a population

has no effect on genetic variation in a population

decrease the number of genetic combinations in a population

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 answer is d p: cell, q: organ, r: organ system, s: tissue