In a 4-pole wave winding connected dc motor, the cross-magnetizing AT/pole for a brush shift of θ radians
(A) Armature amp-conductors × (θ/360o)
(B) Armature amp-turns × (θ/360o)
(C) Armature amp-conductors × (1/4 - θ/360o)
(D) Armature amp-conductors × (1/8 - θ/360o)