I think the answer is a. but I could be wrong.
The obvious answer would be business leaders. The reason why this is true is becaus business leaders were often the ones who were touting the ideas of social darwinism and how their company is better and will stomp out the smaller one in proper sociodarwinistic fashion.
The primary impact area of the Dust Bowl, as it came to be known, was on the Southern Plains. The Northern Plains weren`t so badly affected, but the drought<span>, dust, and agricultural decline were felt there as well. The agricultural devastation helped to lengthen the Great </span>Depression<span>, whose effects were felt worldwide
I found this on Google
I don't think this help but here</span>
It showed them how to begin their government and what rights were protected from it and other people.
The Bolshevik Revolution. Although WW1 was the catalyst that did lead to their downfall.