The answer is D. Isolationism was a period in Americas history when they stayed out of wars and affairs that had nothing to do with itself. Dollar is the american currency, big stick has to do with militarism, good neighbor has to do with helping neighbors and allies.
I hope this helps! :)
The answer is B, each state had one vote, regardless of their size or population.
I beleive it began in Oklahoma. Hope this helps!
we call it the medieval period