[单选题]
Two point charges, iw1 mrbpy g*f).lrj9y5xu8 0ev n 8mdx;kgj6twt0;v- th)yj8 rkc :t 5lcitially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, wj8t 8gtcckhxmvt 6:krt0 y; jld-5);what is the electric force between them?
A. $4.0 \; N$
B. $16 \; N$
C. $1/4 \; N$
D. $1/16 \; N$