Which statement BEST explains the demographic changes that took place as a result of the Industrial Revolution? A) More people migrated to the countryside to get away from the pollution of the factories. B) Family size decreased but population continued to increase as a result of mass migrations and medicine. C) Family size increased due to increased wealth but population overall decreased due to poor working conditions. D) More people from industrialized countries in the West migrated to countries such as India and China to purchase land.