[单选题]
A piece of plastic has a net charge of +2.00 mC. Hm.ku of)v;v9 k 6+d5i(bs afitca2 a+xow manylq6 z0 ,+2vhq9yjbmso qg:/gj more protons than electrons does this piece of p b ovglq/ 0qsm2zq+96 jy:g,hjlastic have?
A. $1.25 \times 10^{13}$
B. $1.25 \times 10^{19}$
C. $2.50 \times 10^{13}$
D. $2.50 \times 10^{19}$
