Answer:
It was both the fault of King Louis & his wife, as well as the clergy and nobility
Explanation:
King Louis and Marie probably could have at least alleviated some of the problems with the 3rd estates view of the upper class, but they didn't. In-fact, they made it worse, by spending money extravagantly on unhelpful things ( such as Marie turning her hair into a boat ). Oversimplified made a really good video on the whole revolution if you want to watch it.
a) the fertile soil led to food surpluses, which supported a larger group of people
It was John D. Rockefeller
If they had a better ruler that was more prepared to take over and listen to the people's ideas, things could have changed.