The world's first civilizations
developed in river valleys because the land in river valleys supported
agriculture. The correct answer between all the choices given is
the second choice or letter B. I am hoping that this answer has satisfied your
query and it will be able to help you in your endeavor, and if you would like,
feel free to ask another question.
The answer is A because the USA believed that democracies don't go to war with other democracies so this applies to cooperation and security which is A.
Answer: pretty sure it is the Compromise of 1850
Explanation:
B is the answer to your question