Land, labor, capital, and entrepreneurship are the a) basis of employment. b) results of production. c) factors of production. d) results of supply and demand.

C)factors of production.

Explanation:

Factors of production, is the correct answer. Land, labor, capital, and entrepreneurs are the factors necessary to produce any good or service in an economy.

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 answer is d.index