Acommmand economy tends to exist under a

A commmand economy tends to exist under a socialist government that provides a lot of regulation.

Explanation:

A command economy is an economy where all economic decision making are been taking by the government. The government controls all the means of production that is what to produce, how to produce and so on in a command economy. All resources are been allocated by the government according to the central plan.

answer; ///i believe that the correct answer is because the house and senate frequently pass different versions of the same bill;

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