A "popular press source" in general refers to any news publication, either on paper or online, that has a wide circulation and is popular. Although this doesn't always mean that it is reputable.
Answer:
The Northern states opposed slavery.
Explanation:
"for it was inevitable that the North, when once aroused, would bitterly resent such pro-slavery demands"
Answer:
Adverb
Explanation:
The <em>fire</em> is being modified by <em />over the river<em /> which is an action, and thus is an adverb.
Answer:
Art history is the study of the development of artistic creations.
The answer to number 3 is C.