Answer:
A i think sorry if am wrong
Karl Ernst Haushofer was a German general, professor, geographer, and politician. Through his student Rudolf Hess, Haushofer's ideas known as Geopolitik influenced the development of Adolf Hitler's expansionist strategies, although Haushofer denied direct influence on Nazi Germany
Serfs were laborers who were bound to their lords property, so though they worked the land, the land still belonged to the lord that they worked for.
the answers is a operating cost increased dramatically
