Their refusal to do any type of military service.
They made Channels underground a lined with clay to prevent sepage in the surrounding soil. They were a big contribution and we still do something inspired by that today.
<span>Cost is defined as the cost of an object or an action require the payment of a specified sum of money before it can be acquired or done.</span>
I think The most suitable answer would be : Government control would prevent those industries from taking advantage of small farmers
Farmers were heavily relied on the railroads to bring their goods to the market. If America's railroads were controlled by corporation , they could imposed a really high transfer price to the small farmers
hope this helps