[单选题]
Two point charges, ini sx x0pm:rxlomx/(f3-tiallj-y j0h w(5ffsy 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.5f 0yh wsfj(-j0 cm, what is the electric force between them?
A. $4.0 \; N$
B. $16 \; N$
C. $1/4 \; N$
D. $1/16 \; N$
