Which of the following was a major concern for the national grange?

corporate income tax
manufacturing prices
railroad monopolies
urban poverty

The national grange was a bunch of farmers, so D is off the list, as is B.

A is about corporations; not a lot to do with farmers, again.

C, though  - railroads totally revolutionized farming industry, because now farmers could sell to people far away. But if one railroad company dominated the industry, they could hike the prices ridiculously high, which irritated the National Grange.

Yes, some people used the depression to the max. not everybody had stocks, and those that didn't bought many things inexpensive, so that when prices rose again, they were much more richer than beforehope this