According to Newton's law of universal gravitation, any two particles
of finite mass attract one another with a force which is
A. Inversely proportional to the product of their masses and directly proportional
to the square of their distance apart
B. Inversely proportional to the product of their masses and directly proportional
to their distance apart
C. Directly proportional to the product of their masses and inversely proportional
to their distance apart
D. Directly proportional to the product of their masses and inversely
proportional to the square of their distance apart