[单选题]
An electron and a przhk ).x+gr+ej o( oe1gc d 8t02exvo5ifton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is pla1g0(c5ee 2xvitfoo d 8ced next to the proton?
A. It doubles.
B. It does not change.
C. It is reduced to half.
D. It becomes zero.
