A System of 12 Electrons and 11 Protons Has a Net

A system of 12 electrons and 11 protons has a net charge of

A) -1.6 $\times$ 10^-19 C.
B) 1.6 $\times$ 10^-19 C.
C) 16.0 $\times$ 10^-19 C.
D) -1.0 $\times$ 10^-19 C.
E) -16.0 $\times$ 10^-19 C.