A free electron and a free proton are placed in an identical electric field. which of the following statement are true? a) each particle is acted upon by the same electric force and has the same acceleration. b) the electric on the proton is greater in magnitude than the electric force on the electron, but in the opposite direction c)the electric force on the proton is equal in magnitude to the electric force on the electron, but in the opposite direction d) the magnitude of the acceleration of the electron is greater than that of the proton e) both particles have the same acceleration.