Most of the settlers of the appalachians came from just a few european countries including which of the countries listed below?

Sole i will mark brainlist to who answer

Brainliesttt !me : ) how did the world react to liberalization measures from the soviet union?

The 20th amendment, also called the lame duck amendment, decreased the amount of time between the presidential election and the inaugration of the new president. what are the advancements that allowed for this amendment?