Answer:
The election of Lincoln served as the primary catalyst of the American Civil War. The United States had become increasingly divided during the 1850s over sectional disagreements, especially regarding the extension of slavery into the territories.
Explanation:
The Puritans were members of a religious reform movement known as Puritanism that arose within the Church of England in the late 16th century. They believed the Church of England was too similar to the Roman Catholic Church and should eliminate ceremonies and practices not rooted in the Bible.
The right answer is "B. Japan was prolonging a terrible and bloody war that had an inevitable outcome."
Throughout the text it is notable that the US is showing that the terrible consequences that the Japan was going through was because Japan was extending the war.
This is quite clear in the passage. "also, because of their leaders' refusal to accept the declaration of surrender that would honorably honor Japan's end to this useless war, we used our atomic bomb."
So, the American side lost this battle: because of this I don't think that it showed whether the Americans would win the war: they lost the battle but not by much, so the final outcome was undecided.
Instead I think that it helped to answer "how the Americans would fight".
But I think that the best answer would be that it showed the Americans that they could win: that they had a good chance at winning. Sadly, this is not one of the options.