the national road could take you as far west a.) cumberland
b.) st. louis
c.) wheeling

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

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the correct answer is :

{b.}   ( american workers lose job opportunities )

hope this : )

    -sprinkles

i dont know sorry why dont you looking it up on google