[单选题]
An atomic nucleus has a charge of +40eowjm/0n xt;0ffcexb o18 :7km. What is the magnitude old6v. 4clg tg jat-t90f the electric field at a distance of 1.0 m from the nucleus?0g gt6.javltd4 lc9-t
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. $6.2 \times 10^{-8} \; N/C$