What is the best explanation for the purpose of the article, "Scratching the Surface of Mars"? A. The author wants the reader to understand all of the advances that have been made in technology to get people farther into space. B. With funding for NASA on the decline, the author is trying to get people to invest in space exploration. C. The author wants the reader to want to travel to Mars, also. D. As space travel advances, NASA needs people to begin colonizing Mars, so the author is trying to entice people to go.