Select all the true statements about gravitation.
A. The magnitude of the gravitational force between two small bodies that are small compared to the distance between them is proportional to the product of the bodies' masses.
B. The gravitational force between two bodies can be attractive or repulsive.
C. The magnitude of the gravitational force between two small bodies that are small compared to the distance between them is proportional to the square of that distance.
D. Newton's theory of gravitation has been superseded by Einstein's theory of general relativity
E. The gravitational force between two bodies is always attractive.