This concept refers to perceiving some features of available data, while ignoring others. This occurs because our perception is influenced by expectations and emotions.
In the example, many people state that they hear evil subliminal messages in the songs because they have assumed it to be true beforehand. Their expectations make them hear the words, even if there aren't any.
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.