Jim drops an iron magnet during a chemistry lab experiment. He finds that it is no longer magnetic. What has happened in terms of its properties?a. A physical change occurred in which the iron remained iron, but lost one of its physical properties. b. A physical change occurred that changed the iron in the magnet into nickel. c. A chemical change occurred that changed the iron in the magnet into nickel. d. A chemical change occurred in which the iron remained iron, but lost one of its chemical properties.