A. A charge of +1 unit and no mass
B. A mass of 1 unit and no charge
C. No charge and no mass
D. A charge of +1 unit and mass of 1 unit
A. A charge of +1 unit and no mass
B. A mass of 1 unit and no charge
C. No charge and no mass
D. A charge of +1 unit and mass of 1 unit