This photo was the least unethical of the group of photos. Yes, they did change reality a little bit but they didn't do it to hurt someone or to make the people who made the magazine look better. They simply did it to accommodate the photo to the cover. I still think its a bit unethical though because they did change how the mountains actually are.
Out of the given photos, I found this the most unethical. The African American man was photo shopped in and that's just not right. They are lying to everyone who looks at the picture. If their campus is so diverse then they can find a picture that shows that.