1. If my memory serves me well, correct answer to this question should be D) Overall the North had the resource advantage in goods and infrastructure. The North had a lot of factories which produced war goods => troops were well-supplied. And also they had strong transportation network like railroads, canals and highways to resupply troops.
2. Eric Foner called the Emancipation Proclamation "perhaps the most misunderstood of the documents that have shaped American history" because according to its content, this document freed slaves only in areas of rebellion. So the answer is C).
3. The same as the first one.