Chivalry. It's not really behavior so much as "I'm more powerful than you and I want your daughter, give me your daughter or I'll kill you", but your history teacher will want the answer chivalry, so I suggest you answer that, lol.
I would say B but I may be wrong
The answer to this question is A.
They hoped to gain wealth and land
I would argue that the primary difference was the introduction of nuclear weapons after WWII--meaning that the spread of communism could actually take over the world as opposed to just causing unrest in the US.
