The answer is D. They are realistic and show the American West. The reason is because, well, that is what Albert Bierstadt painted. Albert was from Germany, but he made several journeys to the west and made paintings of what he saw.
Atticus is ready to speak the truth,Sheriff Tate convinces Atticus that it is in nobody's interest to tell the whole truth when it comes to this particular case. Everyone will lose if the truth came out.
An artist can be influenced by anything. It may be a song they hear, a design they saw, a food they ate, or a story they read. Inspiration is all around us.