I need to answer Chapter 31 discussion questions

I need to answer Chapter 31 discussion questions

1. Should the Americans have dropped the atomic bombs on Japan?
2. Was it ever feasible to think that the spread of nuclear weapons could be contained?
3. Was the Cold War a period of stability or instability in international politics?  Why?
4. Could the Cold War have been avoided?  How?

Please answer in a minimum of 200 words.