As Shown in the Figure,a Wire Is Bent into the Shape

Multiple Choice

As shown in the figure,a wire is bent into the shape of a tightly closed omega (Ω) ,with a circular loop of radius 4.0 cm and two long straight sections.The loop is in the xy-plane,with the center at the origin.The straight sections are parallel to the x-axis.The wire carries a 5.0-A current,as shown.What is the magnitude of the magnetic field at the center of the loop? (μ₀ = 4π × 10^-7 T ∙ m/A)

A) 25 µT
B) 40 µT
C) 54 µT
D) 80 µT
E) 104 µT