Scientists have shown that in our solar system, the planets orbit the sun. Which of the following BEST explains why the planets orbit the sun? A. The sun is larger in size and has a greater mass than each of the planets. B. The sun is smaller in size and has a greater mass than each of the planets. C. The sun is larger in size and has a smaller mass than each of the planets. D. The sun is smaller in size and has a smaller mass than each of the planets.