Four Long Parallel Wires Each Carry 2

Four long parallel wires each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

A) 1.2 × 10^-6 T
B) 2.1 × 10^-6 T
C) 1.2 × 10^-5 T
D) 2.7 × 10^-5 T
E) 0 T