The north's economy was based predominantly on manufacturing,shipping, and other factory businesses.
In the south, however, most of the economy was agricultural, requiring many farmworkers.
The correct answer is: power of the president to keep communications confidential
Executive Privilege refers to the Executive's ability to keep some information private for the public good.
This is of course somewhat of a subjective question, but in general most would agree that yes, there are absolute standards for truth and justice, since we as humans have developed ways of understanding right and wrong.