[单选题]
The maximum torque on a curc 1i-zuk3aw6 gc9ci*o6gnr g1nv 4j hqot/;z( rent carrying loop occurs when the angle between the loop's magnetic(o9c4 1j oq r6n*gicztgh/v n; moment and the magnetic field vector is
A. $0^{\circ}$
B. $90^{\circ}$
C. $180^{\circ}$
D. none of the given answers
