Is it reasonable to expect that more than one subject will experience headaches? A. Yes, because the event that the number of subjects that experience headaches is less than or equal to one is unlikely. B. No, because the event that the number of subjects that experience headaches is less than or equal to one is unlikely. C. No, because the event that the number of subjects that experience headaches is less than or equal to one is not unlikely. D. Yes, because the event that the number of subjects that experience headaches is less than or equal to one is not unlikely.