Hettie has recently moved to the United States from Germany. As she navigates social situations in her adopted country, what would be the BEST way for her to learn about appropriateness in the United States

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

what words? are you talking about to complet what sentence

answer; ///he could not explain why the continents drifted;

answer; action;