[单选题]
A 5.0-C charge is 10 m from a small test charx 2i.slcu8y+6 5 xbf(e 6kutttge*v d w1k,5blnq. What is the magnitude of the electric field at n*q15,d k wlvbthe 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. $4.5 \times 10^{9} \; N/C$