Which of the following is the best definition of Newton's theory of universal gravitation? A. Every object attracts every other object in the universe, with a force that increases as the objects' masses increase and the distance between them decreases.
B. Every object is attracted to the Earth with a force that increases with increasing mass and distance.
C. Every object is pulled downward with a force that increases as the height from which an object is dropped increases.
D. Every object attracts every other object in the universe, with a force that increases as the objects' masses decrease and the distance between them increases.