question: Which of the following actions will increase the gravitational force between two masses, m_{1} and m_{2}, by the greatest amount?
choices.text: Halve the mass of m_{1} and halve the distance between m_{1} and m_{2}. Halve the mass of m_{1} and double the distance between m_{1} and m_{2}. Double the mass of m_{1} and halve the distance between m_{1} and m_{2}. Double the mass of m_{1} and double the distance between m_{1} and m_{2}.
choices.label: A B C D