A 71-M-Long Wire Carrying a Current of 4

A 71-m-long wire carrying a current of 4.9 A will be accompanied by a magnetic field of what strength at a distance of 0.090 m from the wire? (magnetic permeability in empty space µ₀ = 4π × 10−⁷ T⋅m/A)

A) 3.4 × 10−⁵ T
B) 0.69 × 10−⁵ T
C) 1.1 × 10−⁵ T
D) 0.54 × 10−⁵ T
E) ​zero