Positive and negative charges are attracted to one another. The phenomenon of static electricity requires a separation of positive and negative charges. Laundry in a clothes dryer often becomes charged with static electricity while drying. Which of these best explains why a clothes dryer often generates static electricity? A) Short circuits in the dryer charge the laundry. B) Heat from the dryer charges the air and produces lightning. C) Clothes with metal pieces conduct electricity in the dryer. D) Electrons are transferred as clothes rub against each other in the dryer.