An electron moves from point i to point f, in thedirection of a uniform electric field. during this placement: a. the work done by the field is positive andthe potential energy of the electron-field system does notchange b. the work done by the field is positive andthe potential energy of the electron-field systemincreases c. the work done by the field is negative andthe potential energy of the electron-field systemincreases d. the work done by the field is positive andthe potential energy of the electron-field systemdecreases e. thework done by the field is negative and the potential energy of theelectron-field system decreases