[单选题]
An electron and a proton are se (op qqcser52.+,ojouq.*lgkparated by x ifi 813lj/k(rlnzq* apk/3w a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed3/in1zxf*/p wl( 3qakjkr8i l next to the first electron?
A. It quadruples.
B. It doubles.
C. It will not change.
D. It goes to zero.