Regarding the Charges of the Electron, Proton and Neutron

Multiple Choice

Regarding the charges of the electron, proton and neutron:

A) the proton has a positive charge, the electron has a negative charge whose strength is equal to the strength of the proton's charge, and the neutron has no charge.
B) the electron has a negative charge, the proton has a positive charge, and the neutron has a charge that can be positive or negative or zero depending on the ionization of the atom in which it resides.
C) the proton has a positive charge, the electron has a much smaller negative charge, and the neutron has no charge.
D) the proton has a positive charge, the neutron has a negative charge whose strength is equal to that of the proton's charge, and the electron has no charge.
E) these objects are charged only when they reside in an ionized atom; otherwise, all three are uncharged.