Final answer:
The American Dream is a concept that refers to the belief that anyone in the United States can achieve success, prosperity, and upward social mobility through hard work and opportunity. The author of the article, David Wallechinsky, believes that the American Dream is no longer possible, but this is a subjective viewpoint. Option a.
Step-by-step explanation:
The American Dream is a concept that refers to the belief that anyone in the United States can achieve success, prosperity, and upward social mobility through hard work and opportunity. While there is ongoing debate about the current state of the American Dream, the author of the article, David Wallechinsky, believes that the American Dream is no longer possible, as indicated by the poll mentioned in the question. However, it's important to note that this is the author's perspective and not a universally accepted view.