Concept:Electromagnetic induction depends on a changing magnetic flux linked with a conductor.Explanation:An alternating current continuously changes in magnitude and direction.This produces a varying magnetic field around the conductor.By Faraday's law, the induced voltage is proportional to the rate of change of magnetic flux linkage:ε=−dtdΦTherefore, the alternating current induces voltage because its magnetic field is always changing.Answer:Option B.