Consider a Proton Placed near an Infinite Plane of Positive

Consider a proton placed near an infinite plane of positive charge with no other objects close by.The proton would

A) accelerate away from the plane of charge with ever decreasing acceleration.
B) remain motionless.
C) accelerate toward the plane of charge with ever increasing acceleration.
D) move toward the plane of charge at constant acceleration.
E) move away from the plane of charge at constant acceleration.