Which of the following statements are true of the law of universal gravitation?

• A.any two bodies attract each other with a force which is proportional to the difference of their masses
• B.any two bodies attract each other with a force which is inversely proportional to the square of the distance between them
• C.any two bodies attract each other with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them
• D.any two bodies attract each other with a force which is proportional to the square of the distance between them
• E.any two bodies attract each other with a force which is proportional to the sum of their masses