[单选题]
Three point charges are l8ra(nw:k 7d uj( k1 n,k0hiivuocated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3n ,kv(k1i hu0i = -5.00 mC at x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?
A. $5.40 \times 10^{-2} \; N$
B. $0.135 \; N$
C. $8.10 \times 10^{-2} \; N$
D. $0.189 \; N$
