Two Long,parallel Wires Are Spaced 1 M Apart in Air,and $\times$

Multiple Choice

Two long,parallel wires are spaced 1 m apart in air,and you have established a current of 1 A in each.The force per unit length that each wire exerts on the other is approximately

A) 2 $\times$ 10^-6 N/m
B) 2 $\times$ 10^-5 N/m
C) 2 $\times$ 10^-7 N/m
D) 2 $\pi$ $\times$ 10^-5 N/m
E) 2 $\pi$ $\times$ 10^-6 N/m