[单选题]
The gravitational forcecgoxx1b r9h* i +*z)kb between two objec(aatxpkm3 1 r*n ef*hg2mt vp,.g/,id ts is inversely 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.