[单选题]
The gravitational forcef;5 27r 5kj3*aylqmuloy b a3x betw2xlmo26 c l dm,)3jenyeen two objects is proportional to
A. the distance between the two objects.
B. the square of the distance between the two objects.
C. the product of the two objects.
D. the square of the product of the two objects.
