I would say b. Bitter opposition to a U.S. war.
Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be the "separation of powers," since this is how the Founding Fathers sought to prevent tyranny. </span>
The correct answer is Ray Stannard Baker.
Ray Baker (also referred to by his pen name of David Grayson) was an American journalist who was prevalent during the late 19th century and early 20th century. During his muckraking days for McClure magazine, Baker was known for investigative journalism alongside the likes of Ida Tarbell and Lincoln Steffen.
The correct answer is money supply.
The money supply includes all monetary assets that are available in an economy at a specific time period. If the money supply drastically increases then inflation happens and if the money supply decreases then deflation happens. Both can cause horrors for the economy so the economists have to be careful.
The main reason was the South wanted to preserve slavery. The North wanted to abolish it. If you want some other reasons than slavery, let me know, and I will do my best to add more to this answer.