1- The correct answers are: A, B and C.
One of the main characterists of literary realism is that the action has to take place in a real and plausible place. Therefore, for a liteary work to be classified as American Realist, it should take place in any part of the United States of America.
2- The correct answer is A.
This passage belongs to the cathegory of Literary Realism. This is an excerpt from "A White Heron," a story in which the author provides a great amount of detailed description of nature.
This passage gives a very detailed description of Sylvia, a woman that moved to the the Maine woods as a child and has now become one with nature.