During World War II the US went from being an Isolationist nation to a
world power. Explain

During WWII the US didn't want to be involved in the war until Japan bombed Pearl Harbor so then they joined the war. They didn't make fancy tanks and weapons but they made so many that they overwhelmed the other side of the war and won.

I hope this helps!

the catholic church withhold people's access to the bible during the middle ages.

people could go to church and listen to the teachings, but it was absolutely forbidden to own and/or read the books of both the old and new testaments. it was also prohibited to translate the books (which where originally in biblical hebrew) to any other language.

this was done so the church could remain in control of what their teachings were and to enhance their importance and power, while also being able to judge people's actions through information that was unavailable for the general public.