How did the completion of the transcontinental railroad affect companies that made products? a-companies could hire people who worked in different states. b-companies could build factories in the rural west. c-companies could expand into the south. d-companies could ship goods cheaply over long distances.

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first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place