Answer:
The Yalta Conference certainly was not the cause of the Cold War, but it did indirectly contribute to it. ... To this end, Stalin agreed that Russia would join the war against Japan three months after the defeat of Germany but would also be tasked with restoring the nations of Eastern Europe
Explanation:
I think the answer is number 4
The trial of Peter Zenger, a noted publisher in New York, worked to establish the rights of a free press.
Zenger's trial was still fresh in the minds of some of the founders when they worked to push for an Amendment to the Constitution a generation later that expressly gave the press rights.
Answer: If it's in your opinion, then no. But if it's somebody else's opinion that you don't agree with, then you do have to cite your sources.
I hope that makes sense!