A small bird stands on the surface of earth. which of the following is true of the gravitational force that the BIRD exerts on the earth? A. the bird doesnt exert gravitational force on the earth
B. the bird has a smaller magnitude than the gravitational force that earth exerts on the bird.
C. the bird has a larger magnitude than the gravitational force that the earth exerts on the bird
D. it has the same magnitude as the gravitational force the earth exerts on the bird.

I'm between B and D​