The Figure Shows the Cross Section Through 3 Long Wires

Multiple Choice

The figure shows the cross section through 3 long wires with linear mass density 100 g/m.They carry currents I₁,I₂,and I₃ in the directions shown.Wires 2 and 3 are 10 cm apart and are attached to a vertical surface,and each carry a current of 600 A.What current I₁ will allow wire 1 on the right to "float" such that its distance from the vertical surface is 10 cm?

A) 1021 A
B) 512 A
C) 700 A
D) 256 A