Which of the following is a scientific hypothesis? O A. Objects fall toward the ground because this is where their natural place of rest is. B. Apples are more delicious than oranges. O c. Earth rotates about its axis because living things need an alteration of light and darkness. O D. The orbits of the planets in the Solar System must be circles or ellipses, because these geometric shapes are especially simple. O E. Freely falling objects accelerate toward the ground at a constant rate.