Two electrons (e1 and e2) and a proton (p) lie on a straight line, as shown. The directions of the force of e2 on e1, the force of p on e1, and the total force on e1, respectively, are: ______e1________e2________p
A) ?, ?, ?
B) ?, ?, ?
C) ?, ?, ?
D) ?, ?, ?
E) ?, ?, ?
D) ?, ?, ?
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