[单选题]
An atomic nucleus has a chargr;tj 08 kjd,gre of +40e. What is th a n+lcblq0d;mp-vap95ma11ie magnitude of the electric field at a distance of 1.0 m from the nuc n+iqc 1 p;0d-al9lv pamab15mleus?
A. $5.6 \times 10^{-8} \; N/C$
B. $5.8 \times 10^{-8} \; N/C$
C. $6.0 \times 10^{-8} \; N/C$
D. $6.2 \times 10^{-8} \; N/C$