This is because it was when the Allies were able to defeat the Axis powers, which gave hope to the Allies to fight stronger. Also, when they defeated Axis powers at that battle, they(ALLIES), now had vantage points on both sides of Germany; east(UK) and west (Russia).
From your given choices, Language and Art and Architecture
Rotation.
Crop rotation is when a farmer changes the crops grown in the same field each year to ensure he gets the best harvest possible by not exhausting the soil of specific nutrients by repeatedly growing the same thing.
Credit was a new thing, banks didn’t have the money for loans, to much production and not enough consumers (inflation)
