1. What idea/philosophy drove thousands of Americans westward
believing it was their god-given right to expand the United States from
coast to coast. **

Maybe

Explanation:

I'm not 100% sure this is right but one of the reasons they wanted to expand is because one they were running out of room and the Louisiana purchase by roosevelt I think, for a couple billion dollars and two peaple went to go and explore to make sure it was safe. My second thought was the gold rush but peaple alr moved out there before that

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

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;