Về nguyên tắc, người tiêu dùng sẽ tăng lượng tiêu dùng cho đến khi lợi ích cận biên của đơn vị cuối cùng bằng giá đúng hay sai và Vì sao?

Explanation:

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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