What advances in technology cattle drivers economically and what advances hindered cattle driving?

A technological advance that helped cattle drivers economically was the invention of the barbed wire, since this allowed to contain the animals within a certain area without them escaping, while also deterring possible cattle thieves due to their danger when trying to transfer it. This situation resulted in less losses for cattle drivers.

In turn, an advance that hindered cattle driving was the development of the railroad to the west from the mid-1800s, since the use of land and the development of towns as a result of the construction of the railroad removed available land to hundreds of cattle drivers.

i think its either b or c

explanation: