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An electron is travelling directly toward an immobilized negative point charge carrying -5.0. The electron is currently 1.0cm away from the immobilized charge and is travelling at 2×107m. How close will the electron come to the immobilized charge before it comes to a stop and begins travelling in the opposite direction?
A. 1.3mm
B. 4.5mm
C. 6.4mm
D. 7.1mm
E. 9.2mm