Two long parallel copper wires carry current of 5A each in opposite directions. If the wires are separated by a distance distance of 0.5m, then the force per unit length between the two wires is
A. `10^(-5)N//m`, attractive
B. `10^(-5) N//m` repulsive
C. `2 xx 10^(-5) N//m`, attractive
D. `2 xx 10^(-5) N//m`, repulsive
