Which factor helped Astoria become a major fur-trading post? O Astoria was situated on the mouth of the Columbia River.
O Astoria was defended by stone fortifications and heavy artillery.
O Astoria was a lawless place with a thriving black market.
O Astoria was situated on the mouth of the Missouri River.

b or c im pretty sure

during world war ii                                                      

the manhattan project's indispensable man

answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.