The three stages of memory are . A. Encoding, processing, and storage B. Encoding, storage, and retrieval C. Automatic processing, effortful processing, and storage D. Automatic processing, effortful processing, and retrieval

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.

it would be d). more resources must be obtained to attain that combination of goods and services