In some binary systems, one star transfers material ... ...

    In some binary systems, one star transfers material onto the other. If star 1 dumps half of its material onto star 2, which thus increases its mass by a factor of 5, how is the force affected if the distance between the stars’ centers remains the same?
(A) The force increases by a factor of 5.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 04. Gravitation