Answer:
Correct answer is B. hope that international cooperation might prevent global conflict
Step-by-step explanation:
A is not correct as Great Depression happened in 1929 and ended before WW2.
B is correct as United Nations were created to continue the idea of League of Nations, which also had a role to prevent conflicts in the world.
C is not correct as this is not the role of UN, and in this period was more connected with United States and even with creation of NATO.
D is not correct as that was connected to WW2 and Atlantic charter for example.