[单选题]
A 5.0-C charge is 10 m jw2rdoauuaqd62o * px-) 8ti(:8uamkfr (m- -brnkblwa5 j5fvt i78.tt i*)duuom a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at ub) 55nitt7 jim-lt-fau*k r(bw 8.dvthe location of the test charge?
A. $0.045 \; N$
B. $0.45 \; N$
C. $4.5 \; N$
D. $45 \; N$