The law of supply states that - quantity supplied is positively related to price. costs and prices are positively related. a good's supply is positively related to its demand. quantity supplied varies inversely with price.

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

the atm that sounds like it should be the answer