[单选题]
Two charged objects fm z 3sg0+jzi3attract each other with a certain force. If thm,potkb * );yygt6.zve charges on both objects are doubled with no co,6.ygy) bt;tv zmkp*hange 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.
