[单选题]
Two objects, with maenj tbt40 t(h.s.v/9;u+izq fu wo fy;ises $m_{1}$ and $m_{2}$, are originally a distance r apart. The magnitude of the gravitational force between them is F. The masses are changed to 2$m_{1}$ and 2$m_{2}$, and the distance is changed to 4r. What is the magnitude of the new gravitational force?