[单选题]
A 5.0-C charge is 10 m fr1p r63kzqwj 3dhxnw/3ohsuxho*)+ i 5c1:.e(y8fv +yxtlwf hvm a small test charge. What is the magnitude of the electric +f hy lvt(81*5 hfoixveh+)uw:c.sxyfield at the location of the test charge?
A. $4.5 \times 10^{6} \; N/C$
B. $4.5 \times 10^{7} \; N/C$
C. $4.5 \times 10^{8} \; N/C$
D. $4.5 \times 10^{9} \; N/C$