[单选题]
Two charged objects attract each other with a certai8(z 7o* qgeicw c/(qqbn forc 9(c*udjiawiu9v eo ,:e. If the charges on both objects aruvwaj d*9,i: i9( oeuce doubled with no change in separation, the force between them
A. quadruples.
B. doubles.
C. halves.
D. increases, but we can't say how much without knowing the distance between them.