Final answer:
The reason why French society prior to the Revolution had high inequality that was NOT mentioned in the options provided was heavy taxation on the nobility.
Step-by-step explanation:
The answer to the question is B) Heavy taxation on the nobility. While the other three options - limited access to education for the lower classes, rigidity of the feudal system, and unequal distribution of land and wealth - were all reasons why French society prior to the Revolution had high inequality, heavy taxation on the nobility was not one of the factors contributing to the high inequality.