23. General relativity * is a theory of gravity which is equivalent to Newton's gravitational model, except that Newton predicted that black holes would not radiate. O is a theory of gravity which is equivalent to Newton's gravitational model, except for the precession of the perihelion of Mercury. O is a theory of gravity which states that gravity is not a force. O is a theory of gravity which states that gravity is a force that objects feel as they enter regions of curved space.

23. General relativity * is a theory of gravity which is equivalent to Newton's gravitational model, except that Newton predicted that black holes would not radiate. O is a theory of gravity which is equivalent to Newton's gravitational model, except for the precession of the perihelion of Mercury. O is a theory of gravity which states that gravity is not a force. O is a theory of gravity which states that gravity is a force that objects feel as they enter regions of curved space.