"<span>a. largely agrarian, with slave owners as a minority" would be the best option from the list, but it should be noted that even though slave owners were a slight minority, slavery was still very prominent.</span>
Depends. What war are you talking about? If it's WW1, then it's because everyone was stupid at the time and thought their enemies did it and one thing led to another.
<span>Both the United States and the Soviet Union joined this organization after World War II. Takes action in Korea.</span>
<span>The British Civil Service examination system
The United States Civil Service Act of 1883, in part, imitated the British Civil Service examination system. The U. S. Congress envisioned a system based more on practical qualifications rather than the academically based British examinations, however.</span>