Which of the following statement is 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 directly proportional to the square of the distance between them.