I think the answer is b or c because B is all about money. When you have lost of money you want a lot of things. while c is saying how people back then had to work for people and they got noting for it.
Answer:
Explanation:
Understanding needs helps you understand behavior.
I believe option A since the rest have majority relation with the environment and climate.
The war pitted the Central Powers (mainly Germany, Austria-Hungary, and Turkey) against the Allies (mainly France, Great Britain, Russia, Italy, Japan, and, from 1917, the United States). Read more about the Allied powers.