[单选题]
A metal sphere of radius 10 cm carrm53q )u;t h(-lncux *.otyhr hies a charge of +2.0 mC. What is the mqm2:uh0+h6iuvxzj bs10f7fk agnitude of the el62x 1vs+7:j ufm0hbh 0izfqkuectric field 5.0 cm from the sphere's surface?
A. $4.0 \times 10^{5} \; N/C$
B. $8.0 \times 10^{5} \; N/C$
C. $4.0 \times 10^{7} \; N/C$
D. $8.0 \times 10^{7} \; N/C$