A uniform electric field of magnitude 250 /m is directed in the positive x direction. A +12.0 charge moves from the origin to the point (x, y) = (20.0 cm, 50.0 cm). What was the change in the potential energy of this charge?
a. +6×10⁻⁴J
b. +3×10⁻⁴J
c. −6×10⁻⁴J
d. −3×10⁻⁴J