No one, not even he could have averted the war without a historical wrong that could no longer be justified in a democracy - the continuation of legal human bondage in the United States. But to answer the question. Yes, I think it was very possible that no guns had to fire, and it would have been to me a revolting development.
I think the answer is b - the bombing of Pearl Harbor
The correct answer is Francis I
He was a French monarch who is believed to be the first renaissance king of France. He was known for his investments into arts and sciences, and also for making an alliance with Ottomans, more precisely with Suleiman the Magnificent, which was odd for the time period since he was a Christian, unlike the Ottomans.