Answer:
Option B and C
Step-by-step explanation:
The mass of star 1 is greater than star 2 and hence the gravitational force exerted by star 1 on star 2 is greater as compared to the gravitational force exerted by star 2 on star 1
As per the standard equation - gravitational force between two objects is equal to

This equation clearly states that the gravitational force exerted between any two objects is governed by the masses of these objects.
Thus, earth (with constant weight ) exerts more force on star1.